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Karnataka 1st PUC Geography Model Question Paper 3 with Answers

Time: 3 Hrs
Max. Marks: 100

Note:

1. Answer all questions.
2. Draw maps and diagrams wherever necessary
3. Questions No.V is on Cartography.

I. Answer the following in a word or a sentence each. ( 1 × 10 = 10 )

Question 1.
What is Lithosphere?
Answer:
The solid outer layer of the earth is known as Lithosphere.

Question 2.
Where is Gutenberg discontinuity?
Answer:
The boundary that separates the mantle from the core is known as ‘Gutenberg Discontinuity’.

Question 3.
What is the approximate age of the Earth?
Answer:
4.6 Billion years

Question 4.
What is an ‘Orbit’?
Answer:
The path on which the earth revolves around the Sun is called ‘Orbit’.

Question 5.
Why the inner core is called ‘solid core’?
Answer:
It is the lower layer of the Core consisting of hard molten rocks. Most of the materials are in molten form.

Question 6.
Where is Mohorovicic discontinuity?
Answer:
It is a boundary that separates the earth’s crust and the mantle.

Question 7.
Define Isohyets?
Answer:
These are the imaginary lines drawn to join the places with the same amount of rainfall.

Question 8.
What is the length of the land boundary of India?
Answer:
About 15,200 kilometers.

Question 9.
Which is called ‘Mawsynram of South India’?
Answer:
Agumbe of Karnataka is called ‘Mawsynram of South India.’

Question 10.
Define Ptomology.
Answer:
The Scientific study of Rivers.

II. Answer any ten of the following in two or three sentence each. ( 2 × 10 = 20 )

Question 11.
Why Geography is called ‘Earth Science’? (T. B. Qn)
Answer:
Geography is fundamentally a description of the earth. It deals with the varied natural or physical factors of environment, such as toad forms, mountains water bodies, minerals, climate, soils, natural vegetation and plains.

Question 12.
Why the Earth is called ‘Living Planet’?
Answer:
The Earth is the home for all forms of life like plants, animals and human beings because of its suitable distance from the Sun, range of temperature, life supporting gases, atmosphere water cycle etc. It is the only planet that supports life, that is why it is called ‘Living Planet’.

Question 13.
What is a Volcanic earthquake?
Answer:
These are associated with the activity of volcanoes and occur as a result of depth explosion of the gases and magma. Such volcanoes are confined to volcanic areas. The intensity of such earthquakes depends on the intensity of volcanic eruption. They are not very destructive e.g. Krakatau (1883) and Katmai (1912).

Question 14.
Mention the types of sedimentary rocks?
Answer:
Based on Origin and composition sedimentary rocks are divided into three types’

1. mechanically formed rocks,
2. Chemically formed rocks
3. Organically formed rocks.

Question 15.
What is Mass movement?
Answer:
Mass movement includes a variety of gravity induced movements of slope material, but excludes transportation by running water, wind, and glacier. Transfer of one mass of rock debris down the slopes is the regular activity of mass movement. Rockfall, talus, Earth flows, landslides, are the major forms of mass movements.

Question 16.
What is Ionosphere?
Answer:
The thin layer extends from the ozonosphere form an altitude of about 80 to 640 km above the earth surface. The process of ionization takes place in this zone, resulting in a dense concentration of positive ions.

Question 17.
Why is ocean deep or trench important in the Ocean bottom?
Answer:
An arc-shaped depression in the deep ocean floor is called ocean deep or trench. These are the deepest parts of the ocean floor. Ocean trenches are produced by the subduction of oceanic crust under continental crust. They resemble step sided valleys or canyons on the land. Trenches or deeps are generally parallel of the coasts facing mountains and along the islands. Great earthquakes and tsunamis generally take birth in this region.

Question 18.
What is Echo sounding?
Answer:
It is a technique of using sound pulses to find the depth of water. Eco sounder is a device for measuring depth of water by sending pressure waves down from the surface and recording the time until the echo returns from the bottom.

Question 19.
What is the Aquatic bionic?
Answer:
Aquatic regions house numerous species of plants and animals, both large and small. This is where life began billions of years ago. Without water, most life forms would be unable to sustain themselves and the Earth would be a barren, desert-like place. Ponds, lakes, rivers, wetlands and oceans are sources of aquatic biomes.

Question 20.
Why has India selected a Standard Meridian of India with an odd value of 82° 30’ E?
Answer:
On the International basis the globe has been divided into 24 time zones (each of 15 longitudes).
In every zone local time of the middle longitude (divided by 7° 30’) is taken as standard time of the entire zone. Because 82 ’/2 ° E is well divisible by 7° 30’. A standard adopted by almost all the countries ofthe world while they selected a Standard meridian for their respective countries.

Question 21.
Write a short note on Retreating Monsoon?
Answer:
The season of Retreating Monsoon is the period of Transition. During the period of transition low pressure of the north-west shifts to the Bay of Bengal. It results in the formation of cyclones over the Bay. These cyclones cause havoc on the coasts of Orissa and Andhra Pradesh.

Question 22.
State two important flood prone areas of the country.
Answer:
The Ganga Basin: The badly affected states of the Ganga basin area Uttar Pradesh, Bihar and West Bengal.
The Brahmaputra basin: the Brahmaputra along with its tributaries floods the areas of Assam and North West Bengal regions.

III. Answer any eight of the following in 25 to 30 sentences each. ( 5 × 8 = 40 )

Question 23.
Explain the effects of the rotation of the Earth.
Answer:
Rotation of the Earth causes various effects. They are:
a. Day and night caused by the rotation of the earth on its axis. This is because parts of the earth which face the sun have day and the parts which do not face the sun have night. This happen with precision and progression and not suddenly – The time when the sun beings to cast its light in the sky is known as dawn. At noon. The sun is overhead. At dusk, it is twilight and the sun is seen disappearing in the sky. At night, it is completely dark.

b. The duration of the day and night is not equal at all places on the earth because of the inclined axis. The length of days varies with respect to the seasons as well as latitude

c. The sun, the moon and the stars seem to move from east to west. This is because the earth spins from west to east. This effect is similar to what one experiences while looking at trees from a moving train.

d. The speed of rotation has created a centrifugal force resulting in a bulge in the middle portion of the earth and flattened top at the poles.

e. The earth’s rotation affects the movement of water in the oceans. The tides are deflected because of the rotation of the earth.

f. Rotation causes difference in time over various places on the earth.

g. The Earth acts as huge magnet: The one end of the needle of the compass always points towards the north magnetic pole. That means, the earth acts as a magnet. The rotation . of the earth causes the earth to act as a magnet.

h. Rotation of the Earth influences the movement of ocean water, particularly ocean currents.

i. The rise and fall in the sea level is called tides. Rotation of the Earth causes the lacing of water bodies to the Moon. The gravitational attraction of the Moon and position of the water bodies cause tides. This is a regular phenomenon due to Earth’s rotation.

Question 24.
Explain the Earthquake waves?
Answer:
The earthquake waves based on their mode of traveling and velocity are broadly classified into three types. They are,

1. Primary (P) waves
2. Secondary (S)waves
3. Surface (L) waves

1. Primary (P) waves: These are also known as Push waves or waves of compression. The particles vibrate in the direction of the movement of the wave, similar to a sound wave. They can travel through solid, liquid and gases. The velocity varies from 5.5 to 13 km per second depending on the medium of their travel they are the first to be recorded in the epicenter by the seismograph.

2. Secondary (S) waves: They are recorded on a seismogram after the P) waves. These are also called traverse or shake waves (S). These are distortional waves as the particles vibrate at right angles to the direction of the movement of the waves. The velocity of the secondary waves varies form 3 to 7 kms per second. They can travel through the interior and outer layer of the earth but cannot be transmitted by liquids.

3. Surface waves: These are also described as Long waves (L). The ‘L’ waves travel along the surface of the earth and are recorded after ‘P’ and ‘S’ waves. Their speed is 4 kms. The surface waves are most destructive as they vibrate much.

Question 25.
Explain the types of River Course.
Answer:
River is an important external agent of denudation on the ever-changing face of the Earth. The work of river is more or less common in all the drainage systems of the world.
The work of river consists of three closely interrelated activities.

1. Erosional work: The process of wearing and taking away the part of rock is known as ‘Erosion’. It depends upon the volume and velocity of water, nature of slope and the nature of rocks. The erosional work of the river is performed in two ways.
a. The Mechanical and b. The Chemical erosion.
There are various Iandforms associated to erosional work of river.

a. ’V’ Shaped valley: In the mountain course the speed of the river is greater and volume is less. As the water rushes down the steep slopes there is maximum vertical , or later erosion. The rapid down cutting or vertical erosion results in the formation of ‘V’shaped valley.

b. Gorge: A deep and narrow valley with steep rocky, sides in the river course is known as ‘Gorge’. They are formed by the regular vertical cutting by the rivers in the valleys eg. Narmada gorge.

c. I shape valley: Avey steep, deep river valley formed by the river, lookinglike T, is called ‘I’ Shaped valley. These are very deep compared to gorges.

d. Canyon: It is a wide, deep and steep valley almost with vertical walls like feature found in the arid or semi arid regions is called ‘Canyon’ eg. Grand Canyon of River Colorado in USA.

e. Potholes: These are the small depressions in the rocky beds of other river valley. They are formed by corrosion. Pebbles, sand and small rocks carried by the river swirled around on the river bed. This action erodes the rock on the river bed forming potholes.

f. Waterfalls: Huge volume of water falling from a great height along the course of a river is called “Waterfalls’. They are formed when the hard and soft rocks come in the way of flowing river. The soft rock gets eroded faster and hard rock does not erode easily. Therefore huge amount of water falls from great height and creates waterfalls. Eg. The Jog falls, The Angel falls, The Victoria falls.

g. River Capture: It is formed mainly due to head-ward erosion by the river near its source. When the source of a river is captured by another major and strong river it is called‘River Capture’.

2. Transportational work: The process of carrying away the eroded materials is known as ‘Transportation’. The rock materials and eroded particles carried by a river is called its Load. The transportation capacity of a river is based on velocity of water, volume of water, load, slope, smooth valley floor etc.

The major landforms associated with the transportational work of the river are:

a. Alluvial fans: The term alluvium refers to the debris transported and deposited by rivers. When the fast flowing river enters the plateau or plain region, it experience sudden decline in gradient and obstruction in its path. Due to obstruction of the river spreads and deposits many of its light materials in fan shape known as ‘alluvial fans’.

b. Alluvial cones: In the plateau and foot hill region when the river spreads out, the eroded materials carried by the river is deposited in conical shape called ‘Alluvial cones’.

3. Depositional work: The process of carrying and accumulating the eroded materials by the river at the lower course is called ‘deposition’. In the lower course due to gentle slope the river slows down and deposits most of its materials on the banks, course and the mouth.

The important landforms resulting from depositional work of the river are:

a. Meanders: In the lower course, river flows slowly in zig zag or curved manner due . to smaller obstruction in its path. A curve or loop formed by the river in its path is called ‘Meander’. When the river course formed by such crescent shaped loops due to continuous lateral deposition it is called meandering course.

b. Ox-bow Lakes: The ox-bow lakes are formed by depositional and erosional actions taking place simultaneously and they are a result of excessive meandering. The River which flows through the shorter route leaving the curve of the meander cut off and crescent shaped lake is formed known as‘Ox-bow lakes’.

c. Flood Plains: When the river is in floods the water overflows on its bank and spreads in the surrounding regions. The silt carried by the water gets deposited in these areas and creates flat plains on both the banks of the rive known as ‘Flood Plains’.

d. Delta: A triangular shaped alluvial deposition forced at the mouth of the river is called ‘Delta’. Important types of deltas are

a. Arcuate or Common delta
b. Bird-foot delta

e. Distributaries: As the river approaches the sea or Ocean, due to reduction in gradient, joining of tributaries, its volume increases, speed decreases hence, the rivet begins to break up into a number of branches from the main river called ‘Distributaries’.

f. Estuary: Estuaries are the tidal mouth of a river having a narrow, gradually widening lay at the mouth. In Estuary River water is mixed with seawater. Eg. The Narmada estuary, The Kali estuary.

Question 26.
What is solar radiation? Explain the factors controlling solar radiation.
Answer:
The solar radiation is in the form of shot waves. These waves strike the outer surface of the atmosphere. About 53% of the energy is lost through scattering by gas molecules, reflection by clouds and absorption by water vapor and other particles. Only about 47 percent of the energy reaches the surface.

Controlling factors: Insolation is not uniform on all parts of the earth’s surface. It differs from one region to another and also from one season to another. The important factors determining the amount of solar radiation are:

a. The angle of incidence of the sun’s rays: The sun rays do not strike the earth surface at an. equal angle. They are almost perpendicular as well as concentrated near the equator and slanting as well as spread over a large area at the poles.

b. Atmosphere: The amount of insolation also depends on the atmosphere through which it passes. The amount of cloud cover, its thickness, dust, water vapour absorbs temperature.

c. Duration of Day: The duration of sunshine or day varies with the seasons and latitudes. Longer the duration of sunshine, more will be the insulation and vise versa, d. Distance between the earth and the sun: The earth revolves around the sun on its orbit. It is nearest to the sun on January 3 and far away on July Thence the solar radiation is more in January than in the month of July.

Question 27.
What are the characteristics of Isobar?
Answer:
The distribution of pressure over the earth’s surface or part of it is shown by means of isobars.
The term isobar means line ofjoining the places of equal pressure.
Important characteristics of isobars are:

• If the isobars are far apart, it indicates gentle pressure gradient as well as calm weather characterized with light surface winds.
• The isobars usually follows east-west trend.
• The isobars deviate in their trend at the point of their entrance from sea to land as well as from land to sea.
• The isobars are almost parallel to latitudes in the southern hemisphere due to predominance of oceans.
• If the isobars are close to earth other it represents steep isobaric gradient. It also indicates more atmospheric disturbances as well as strong winds.

Question 28.
What are the cyclones? Explain the types of cyclones.
Answer:
Cyclone is a small low pressure area in the centre surrounded by high pressure. The winds blow spirally towards the low pressure area and form convergence of winds. In the northern hemisphere the direction of cyclonic winds is anti-clockwise and in the Southern hemisphere it is clockwise. The cyclones are classified into two types.
(i) Tropical Cyclones: The origin of tropical cyclones is much related to intensive They cause heavy rainfall with high-velocity winds. Tropical cyclones are highly dangerous and devastating.

(ii) Temperate Cyclones: In the temperate region, cyclones are produced by the meeting of warm air mass of tropical region and cold air mass of the polar region. The tropical. air mass is lighter and it is pushed up by the advancing dense cold air mass. The process of mixing of these two air masses takes palace in the form of cyclones. They are ‘ associated with heavy rainfall.

Question 29.
Explain the factors affecting Rainfall.
Answer:
There are various factors affecting the rainfall. They are as follows:
Latitude: Rainfall is influenced by the latitude. If the latitude is low, temperature will be high. Water vapour in the air depends upon the temperature. Rainfall depends upon the amount of water vapour in the air. Evaporating is highest in the equator and least at the poles. Therefore rainfall is more in the equator and less or nil at the poles.

Distance from the sea: Winds blowing from the sea bring rainfall over the coastal lands. But as these winds go further, they become drier. Therefore they do not bring much rainfall in the continents.

Mountains: There is heavy rainfall in the windward side of the mountains because the mountains obstruct the winds carrying moisture. But there is little rainfall on the leeward side of the mountains. This is because, by the time the winds cross the mountains, they lose much of their moisture and become dry.

Type and direction of winds: Winds blowing from the sea contain moisture, and therefore bring rain to the land over which they blow. But winds blowing from the land is dry, and therefore, they do not cause rains. Similarly winds blowing from the cold regions to hot regions cause little rainfall, while the winds blowing from hot regions to cold regions cause more rainfall.

Vegetation: Rainfall is more in a region where there is thick vegetation, i.e., forests, because the forests make the air cool. That is why, Assam and mainland areas get more rainfall than the desert and the malnad areas.

Question 30.
Explain the topography of the Ocean floor with a diagram. (T. B. Qn )
Answer:
On the basis of the depth, the ocean floor can be divided into four zones, parts or relief features. They are.

1. The continental Shelf: The gently sloping portion of the continent or land that lies submerged below other sea is called the continental shelf. The continental shelf has a very gentle slope. It extends form the shore line to depths between 180 and 200 meters. Average width of the continental shelves is about 48km. The extent of the continental shelf depends on the relief of the broadening land masses.

If the coastal area is a plateau area, the continental shelf will be very broad. On the other hand, if the coastal region is hilly or mountainous, the continental shelf will be very narrow or even absent for example the Atlantic Ocean has 2.3%, the Pacific Ocean has 5.7% and the India Ocean has 4.2%.

2. The continental slope: The zone of steep slope that descends from the edge of the continental shelf to the deep sea plains is called “continental slope”. It is the transitional zone lying between the continental shelf and the deep sea plains. The continental slope is very steep. It extends from 182 meters to 3.600 meters. The angle of the continental slope is 2 to 5 degre3es or even more. It occupies only 8.5% of the total area of the ocean floor. But it varies from ocean to ocean. The Atlantic Ocean has broader continental slopes and accounts for 12.4%. But it is 7% of the Pacific Ocean and 6.5% of the Indian Ocean.

3. The deep sea plains: The level and rolling areas of the ocean floor are generally called deep sea plains or abyssal plains or the ocean plains. They lie between 3,000 and 6,000 meters below other surface of the ocean. They occupy vast area of the ocean floor and account for about 82.7% of the total sea floor. They cover about 90% in the Indian Ocean. Their depth ranges from 5,000 to 6,000 meters. They are covered by oozes, which are the remains of deep sea creatures and plants, and of red volcanic dust.

4. The Ocean Deeps: The long narrow and deep troughs on the ocean floor are known as ‘ocean deep’ or ‘trough’. They cover only 1% of the ocean floor. They are most common neat the coasts where young fold mountains, volcanoes and earthquakes abound. Some they are tectonic in origin. They are the deepest portions of the ocean. Deeps may be caused due to tectonic forces, i.e. faulting earthquakes etc. There are 57known deeps. Of these 32 are found in Pacific Ocean, 19in the Atlantic Ocean and 6 in the Indian Ocean. The deepest trench in the world is Challenger deep located in Mariana Trench to the west of Philippines in the North Pacific Ocean.

Question 31.
Explain the major seismic zones of India.
Answer:
Zone V: This is the most severe seismic (intensity above 7 in Richter scale) seismic zone and is referred as Very High Damage risk zone. The areas are. Northeastern states, parts of Jammu Kashmir, Uttarkhand, and Bihar and Kutch region.

Zone IV: This zone is second in severity (intensity between 5 and 7 in R.S) to zone VG. This is referred to as High Damage Risk zone. Northern regions of Jammu and Kashmir, Himachal Pradesh, Parts of Bihar, UP, Gujarat, West Bengal lie in this region zone. Northern regions of Jammu and Kashmir, Himachal Pradesh, parts of Bihar, UP, Gujarat, West Bengal.

Zone III: This is termed as Moderate Damage (very strong) Risk zone (intensity between 3 and 5 in R.S). The areas are Gujarat, Madya Pradesh, Rajasthan, Chhattisgarh, Odisha, Maharashtra, Northern Karnataka, Andhra Pradesh, West coastal region etc.

Zone II: This zone is referred to as low Damage (strong) Risk Zone (intensity 2 to 3 R.S). The areas are Rajasthan, Madhya Pradesh, Parts of Karnataka, Andhra Pradesh, Odisha etc.

Zone I: This zone is termed as Very Low Damage (Slight-tremor) Risk Zone. The left out parts of India and Deccan Plateau region.

Question 32.
Peninsular Plateau is the largest physical divisions of India. Explain its features.
Answer:
The Peninsular Plateau is the largest and oldest physiographic division of India. It lies to the south of the Northern Great Plains and covers and area of about 161akh sq km. The elevation of this upland varies from 600 to 90m. This is in inverted triangle shape, with wide base lying in the north and the apex formed in the south, with tilt towards south eat.

It is bounded by the Aravallis in the North West, Bundelkhand plateau in the north, Rajmahal hills in the north east, the Western Ghats in the west and the Eastern Ghats in the east. The highest peak of Peninsular plateau is Anaimudi (2695 m) situated in Annamali hills of Kerala.

On the basis of relief features the peninsular plateau is divided into two main divisions. They are, The Central high lands: This is a smaller region of peninsular plateau situated to the north of the Narmada river. It is slightly tilted towards north. It include the Aravallies, the Malwa plateau, the Vindhya range, the Bundelkhand, the Baghelkhand and Chotanagpur plateau and Rajmahal hills.

The Aravallies runs from north east to south west for about 8900 km between Delhi to Gujarat. It is one of the oldest folded mountains of the world. Its highest peak is Guru Shikar (1722m). It separates Rajasthan- upland and agricultural region. The Aravallis are composed of quatizetes, gneisses and schists.

Rivers like the Luni, Sabarmati and the mahi flow from Aravalli ranges. The Malwa plateau is bordered by the Aravallis in the north and the vindyan range in the south. This plateau has to drainage systems i) Narmada and Mahi towards the Arabian Sea ii) Chambal, Sind, Betwa and Ken towards the Bay of Bengal. ’

The vindyan range extends in ease west direction for about 1050km. The kaimur hills lies in the east of Vindhya range and the Maikala range forms a link between the Vindhya and Satpura ranges.

The Deccan Plateau: this is a triangular plateau situated to the south of the river Tapi or Tapti. The Deccan trap is the crystalline core of the lava effusions forming this plateau are believed to have occurred through a fissure volcano and this region is considered a lava shield. It occupies the areas of Maharashtra, Karnataka, Andhra Pradesh and parts of Chhattisgarh, Odisha and Tamil Nadu.

Eastern Ghats: They form eastern boundary of the Deccan Plateau. They are “separated by the river valleys. The Eastern Ghats stretch to 800 km from Mahanadi valley in the north to Nilgiri hills in the south. Its average height is around 600m.Nallamalla, Kallamalai, B.R.Hills and M.M.Hilis are the important hills of Eastern Ghats.

The important peaks are Aramakonda, Singaraju, Nimalgiri, Mahendra giri etc. Aramakonda is considered as the highest peak of the Eastern Ghats. These zones are rich in Iron ore, Manganese ore, Limestone, Coal, Mica etc.

Western Ghats: It is also known as Sahyadris. They are almost continuous mountain system running parallel to west coast for about 1600km., from north-west to south direction. The Western Ghats meet the Eastern Ghats in Nilgiri hills.

The Western Ghats form a watershed of the peninsular rivers. Important rivers like the Godavari, Krishna, Kaveri, Sharavati, Periyar etc, rise in this zone. They are sources of hydro¬electricity. They are covered with dense evergreen and monsoon forest and rich bio-diversity zones.

Question 33.
Describe the major types of forest in India.
Answer:
The peninsular region of India has the largest forest cover with around 57% of the total forest area.
According to geo-climatic conditions, forests are classified into:

a. Evergreen Forests: These forests are found in the regions of heavy rainfall and high temperature. Tall umbrella shaped trees with dense assemblage is a prominent feature of this forest. The eve4rgree forest always looks green because various species of trees are found here and they shed leaves in different seasons.

The hardwood trees, rose wood, white cedar, toon, gurjan, chaplash, ebony, Mahogany, canes, bamboo, shisham etc. These are found in North-east India, Western Ghats, Andaman and Nicobar islands, parts of Assam and some areas of Himalayan foot hills.

b. The Deciduous forests: The deciduous forest covers a wide range of rainfall regimes. The trees of these forests seasonally shed their leaves. The Indian deciduous forest is found in a range of landscapes from the plains to the hills. These forests provide shelter to most endangered wild life in the country, such as the Tiger, Asian Elephant, Bison, Gaur etc. The deciduous forest are two types

(i) Moist Deciduous forests: The moist deciduous forests are found in wet regions, receiving annual rainfall between 100cm to 200cam and temperature of 25° C to 30° C. The trees of these forests shed their leaves during spring and early summer. They are found on the eastern slopes of the Western Ghats, Chota Nagpur Plateau, the siwaliksetc.

(ii) The Dry Deciduous Forests: The dry deciduous forest are found I the areas where annual rainfall is between 50cm to 150 cm and temperature of 25° C to 30° C. Sal is the most significant tree found in this forest. Varieties of acacia and bamboo are also fund here. These forests are found in areas of central Deccan plateau, South-east of Rajasthan, Punjab, Haryana and parts of Uttar Pradesh and Madhya Pradesh.

(iii) The mountain forests: As the name indicates these forests are confined to the Himalayan region, where the temperature is less compared to other parts of the country. The trees in this forest are cone shape with needle like leaves. The important trees are oak, fir, pin e spruce, silver fir, deodhar, devdar, juniper, picea chestnut etc. They provide softwood for making country boats, packing materials and sport articles.

c. The Desert forests: These forests are found in the areas of very low rainfall. Thorny bushes, shrubs, dry grass, acacia, cacti and babul are the important vegetation found in these forests. The Indian wild date known as ‘Khejurs”, is common in the deserts. They have spine leaves, long roots and thick fleshy stems in which they store water to survive during the long drought. These vegetations are found in Rajasthan, Gujarat, Punjab and Haryana.

d. The Mangrove Forests: These forests occur along the river deltas (Ganga, Mahanadi. Godavari and Krishna) of eastern coast and also concentrated in the coastal areas of Katchch, Kathiawar, and Gulf of Khambar. The mangrove forests in the Ganga delta are called Sunder bans because, they have extensive growth of Sundari trees. The trees in these forests are hard, durable and are used in boat making and as fuel. In the recent years mangrove vegetation is being grown I the coastal areas to control effects of tidal waves and coastal erosion.

Question 34.
What are Biosphere reserves? Mention the important biosphere reserves of India.
Answer:
A biosphere Reserve is a unique and representative ecosystem of terrestrial and coastal areas .The regions surrounding the biosphere reserves would be utilized for the research and experimentation in developing forest and other products.

The Man and the Biosphere Programme (MAB) of UNESCO was established in 1971 to promote interdisciplinary approaches to management, research and education in ecosystem conservation and sustainable use of natural resources. Eight of the eighteen biosphere reserves are a part of the world network of Biosphere reserves, based on the UNESCO man and the Biosphere Programme list.

The objectives of Biosphere reserves:

• Conservation of biodiversity and ecosystem.
• Association of environment with development.
• International network for research and monitoring.

Sl.No	Name of the Biosphere reserve	State	Estd.Year
1.	Nilgiri Biosphere Reserve	Tamilnadu, Kerala, Karnataka	2000
2.	Gulf of Mannar Biosphere Reserve	Tamil Nadu	2001
3.	Sunder bans Biosphere Reserve	West Bengal	2001
4.	Nanda Devi Biosphere Reserve	Uttarkhand	2004
5.	Nokrek Biosphere Reserve	Meghalaya	2009
6.	Panchmarhi Biosphere Reserve	Madhya Pradesh	2009
7.	Simlipal Biosphere reserve	Odisha	2008
8.	Achanakmar-Amarkantak	Chhattisgarh, Jharkhand	2012

IV. Answer any one of the following. ( 10 × 1 = 10 )

Question 35.
Describe the landforms associated to work of river.
Answer:
River is an important external agent of denudation on the ever-changing face of the Earth. The work of river is more or less common in all the drainage systems of the world.
The work of river consists of three closely interrelated activities.

1. Erosional work: The process of wearing and taking away the part of rock is known as ‘Erosion’. It depends upon the volume and velocity of water, nature of slope and the nature of rocks. The erosional work of the river is performed in two ways.
a. The Mechanical and b. The Chemical erosion.
There are various Iandforms associated to erosional work of river.

a. ’V’ Shaped valley: In the mountain course the speed of the river is greater and volume is less. As the water rushes down the steep slopes there is maximum vertical , or later erosion. The rapid down cutting or vertical erosion results in the formation of ‘V’ shaped valley.

b. Gorge: A deep and narrow valley with steep rocky, sides in the river course is known as ‘Gorge’. They are formed by the regular vertical cutting by the rivers in the valleys eg. Narmada gorge.

c. I shape valley: Avey steep, deep river valley formed by the river, lookinglike T, is called ‘I’ Shaped valley. These are very deep compared to gorges.

d. Canyon: It is a wide, deep and steep valley almost with vertical walls like feature found in the arid or semi arid regions is called ‘Canyon’ eg. Grand Canyon of River Colorado in USA.

e. Potholes: These are the small depressions in the rocky beds of other river valley. They are formed by corrosion. Pebbles, sand and small rocks carried by the river swirled around on the river bed. This action erodes the rock on the river bed forming potholes.

f. Waterfalls: Huge volume of water falling from a great height along the course of a river is called “Waterfalls’. They are formed when the hard and soft rocks come in the way of flowing river. The soft rock gets eroded faster and hard rock does not erode easily. Therefore huge amount of water falls from great height and creates waterfalls. Eg. The Jog falls, The Angel falls, The Victoria falls.

g. River Capture: It is formed mainly due to head-ward erosion by the river near its source. When the source of a river is captured by another major and strong river it is called‘River Capture’.

2. Transportational work: The process of carrying away the eroded materials is known as ‘Transportation’. The rock materials and eroded particles carried by a river is called its Load. The transportation capacity of a river is based on velocity of water, volume of water, load, slope, smooth valley floor etc.

The major landforms associated with the transportational work of the river are:

a. Alluvial fans: The term alluvium refers to the debris transported and deposited by rivers. When the fast flowing river enters the plateau or plain region, it experience sudden decline in gradient and obstruction in its path. Due to obstruction of the river spreads and deposits many of its light materials in fan shape known as ‘alluvial fans’.

b. Alluvial cones: In the plateau and foot hill region when the river spreads out, the eroded materials carried by the river is deposited in conical shape called ‘Alluvial cones’.

3. Depositional work: The process of carrying and accumulating the eroded materials by the river at the lower course is called ‘deposition’. In the lower course due to gentle slope the river slows down and deposits most of its materials on the banks, course and the mouth.

The important landforms resulting from depositional work of the river are:

a. Meanders: In the lower course, river flows slowly in zig zag or curved manner due . to smaller obstruction in its path. A curve or loop formed by the river in its path is called ‘Meander’. When the river course formed by such crescent shaped loops due to continuous lateral deposition it is called meandering course.

b. Ox-bow Lakes: The ox-bow lakes are formed by depositional and erosional actions taking place simultaneously and they are a result of excessive meandering. The River which flows through the shorter route leaving the curve of the meander cut off and crescent shaped lake is formed known as‘Ox-bow lakes’.

c. Flood Plains: When the river is in floods the water overflows on its bank and spreads in the surrounding regions. The silt carried by the water gets deposited in these areas and creates flat plains on both the banks of the rive known as ‘Flood Plains’.

d. Delta: A triangular shaped alluvial deposition forced at the mouth of the river is called ‘Delta’. Important types of deltas are

a. Arcuate or Common delta
b. Bird-foot delta

e. Distributaries: As the river approaches the sea or Ocean, due to reduction in gradient, joining of tributaries, its volume increases, speed decreases hence, the rivet begins to break up into a number of branches from the main river called ‘Distributaries’.

f. Estuary: Estuaries are the tidal mouth of a river having a narrow, gradually widening lay at the mouth. In Estuary River water is mixed with seawater. Eg. The Narmada estuary, The Kali estuary.

Question 36.
What is Bio-diversity? Explain the types and conservation of Bio-diversity.
Answer:
Bio-diversity means the diversity of variety of world’s living organism. In other words, the variety of species both flora and fauna present in an area is known as “bio-diversity”. According to the world resource institute: bio-diversity is a variety of the world’s organism’s including their genetic diversity and the assemblage they form.

The earth is endowed with a rich variety of living organisms. About 3,50,000 species of plants and 30, 00,000 species of animals have been identified so fat. India is one of the twelve countries of the world very rich in bio-diversity. India has about 46,000piant species and 81,000 animal species.
Types of Bio-diversity: Bio-diversity can be classified into there types. They are :

Genetic diversity, Species diversity and Eco-system diversity.

a. Genetic diversity: Genetic diversity refers to the variety of genes present in the members of species. This is basic level.

b. Species diversity: Species diversity refers to the variety of species in a specific place or among a specific group of organisms. This is the most familiar type and is found in the tropical zone that in cooler areas. India is rich in bio-diversity. This is due to its tropical location, varied relief features and climate.

c. Eco-system diversity: Eco-system diversity refers to the variety of geographical situations on the earth such as lakes, forests, deserts etc, and the number of plants and animals found in each. Each type of ecosystem has a variety of species that differ from each other.

Conservation of bio-diversity: As loss of biodiversity is not desirable, there should be conservation of biodiversity. Effort should be made to maintain biodiversity.

The following steps may be taken for preserving biodiversity:

• The biological diversity should be identified and monitored.
• There should be the development of national strategies and programs for conserving biological diversity.
• National parks and sanctuaries must be developed for the protection and maintenance of plants and animals.
• Botanical gardens should be developed for the developed for the development and maintenance of new species of flower and other plants.
• Zoos should be developed for the protection and development of rare and new animal species.

V (A) Answer the following in a sentence each. ( 1 × 5 = 5 )

Question 37.
What is latitude?
Answer:
These are the imaginary angular lines drawn parallel to the equator.

Question 38.
Define Index.
Answer:
A map is defined as a symbolical and conventional representation of the earth or a portion fit drawn to scale on a flat surface and bounded by the geographical coordinates as viewed from above.

Question 39.
What is Weather Map?
Answer:
They show the weather conditions at fixed time. Average atmospheric pressure, wind velocity and direction, cloudiness, rainfall, drizzle; know fall, sea conditions and other weather phenomena are shown on these maps. These maps are published daily by the meteorological department.
i.e. Indian Daily Weather Report.

Question 40.
What is full form of GIS?
Answer:
Geographical Information System.

Question 41.
Give an example for Large scale map.
Answer:
The distribution maps, where the dot method is applied to show the distribution of economic phenomena e.g. population, agricultural crops, industries etc. Dots of uniform size are used where each dot represents a certain number or quantity.

(B) Identify the latitudes and longitudes for the given places. ( 1 × 5 = 5 )

Question 42.
Bellary

Question 43.
Hubli

Question 44.
Madikeri

Question 45.
Shimoga

Question 46.
Hassan

Answers:

(C) Draw diagrams to the following. ( 2 × 2 = 4 )

Question 47.
Layers of earth interior.
Answer:
Earth’s Interior :
The Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life in the known universe.

Question 48.
Temperate zones.
Answer:
The Temperate zone: In between the Torrid and the frigid zones i.e., between 23Y20N and South and 66V20N and S lies the Temperate Zone. ¡n this zone the sun’s rays fall obliquely and hence the region experiences a moderate climate.

(D) Draw the outline map of India, mark and name the following

Question 49.
Map drawing. (2)

Question 50.
Perennial River system of India. (2)

Question 51. (2)
Manas and Cold desert biosphere reserves.

Answers:
National park and Wild life in India

Rivers and Lakes

Biosphere Reserves

1. Nanda Devi Saikhawa
2. Nokrek
3. Manas
4. Dibru
5. Dehang Debang
6. Sunderbans
7. Gulf of Mannar
8. Nilgiri
9. Great Nicobar
10. Similipal
11. Khanghendzonga
12. Panchamarhi
13. Agasthymalai
14. Achanakmari – Amar Kantak

Students can Download 1st PUC Geography Previous Year Question Paper March 2014 (South), Karnataka 1st PUC Geography Model Question Papers with Answers helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka 1st PUC Geography Previous Year Question Paper March 2014 (South)

Time: 3 Hrs 15 Min
Max. Marks: 100

Instructions:

1. Answer All the questions.
2. Draw map and diagrams wherever necessary.
3. Question No. V is on cartography
4. Blind students attempt only VA, 52, 53 and 54 instead of V – B, C and D.

I. Answer the following questions in a word, or a sentence each: (10 × 1 = 10)

Question 1.
What is Bio geography?
Answer:
A discipline that deals with the living organisms on the earth.

Question 2.
What is earth’s axis?
Answer:
An imaginary line joining north and south poles passing through Centre of the earth.

Question 3.
What is weathering?
Answer:
Process of disintegration and decomposition of rocks.

Question 4.
How does granular disintegration occur?
Answer:
Breaking of rocks into different mineral grains.

Question 5.
Which region is predominant in carbonation?
Answer:
Limestone regions.

Question 6.
In which layer of the Atmosphere Aurora found?
Answer:
Thermosphere.

Question 7.
What is Hydrological cycle?
Answer:
The cyclic movement of water between the atmosphere and surface of the earth.

Question 8.
What is salinity?
Answer:
The total amount of dissolved solids in the ocean water.

Question 9.
What are Biomes?
Answer:
A district group of life forms and the environment in which they are found.

Question 10.
Mention the International boundary line between India and China?
Answer:
The Me Mahon line

II. Answer any ten of the following in two or three sentences each: (10 × 2 = 20)

Question 11.
Mention any two causes for the occurrence of volcanoes.
Answer:
The temperature inside the Earth increases with the increasing depth (1°c per 32m)
Formation of magma because of increase in temperature in pressure.

Question 12.
What is delta? Name any two types of delta.
Answer:
A triangular shaped alluvial deposition formed at the mouth of the river is called ‘Delta’. Important types of deltas are
a. Arcuate or common delta
b. Bird – foot delta

Question 13.
What is the role of Ionosphere in the Atmosphere?
Answer:
These electrically charged particles are known as “Ions” and hence this layer is known as Ionosphere. Radio waves transmitted from the Earth are reflected back to the Earth by this layer. It helps in Radar, Navigator communication. The ionosphere protects us from meteors.

Question 14.
Mention the important features of Inversion of temperature.
Answer:
It is a process of temperature increases with increasing height in troposphere. This feature is common during winter season, less cloudiness, slow movement of winds, and clear sky in the mountain valley.

Question 15.
Mention the features of cyclonic winds.
Answer:
Cyclone is a small low pressure area in the center surrounded by high pressure. The winds blow spirally towards the low pressure a area and form convergence of winds. In the northern hemisphere the direction of cyclonic winds is anti clock-wise and in the Southern hemisphere it is clockwise.

Question 16.
Name the four submarine relief features of the ocean floor.
Answer:

The major submarine relief features are

1. The Continental slope
2. The Continental Slope
3. The Deep Sea Plains
4. The Ocean Deep.

Question 17.
Mention any two uses of tides.
Answer:

Tides are useful to man and a society in various ways. They are:

• Tides increase the depth of water in shallow harbours and help navigation during high ties.
• Tides clean the entrance of ports, harbours and river mouths.
• Tides help fishing and other aquaculture activities.
• Tides promote salt and foam production in the coastal areas.
• Tides promote the generation of tidal energy

Question 18.
Write the latitudinal and longitudinal extent of India.
Answer:
The latitudinal extension is 8°4’ N to 37°6’ N and the longitudinal extent is 68° 7’ E to 97°23 E .The latitudinal and longitudinal extent of India is around 30° The country stretches to 3214km from North to South and 2933 km from West to East.

Question 19.
Distinguish between Bhangar and Khadar plains.
Answer:
Bhangar Plains: It is an Old Alluvium. It contains the Kankar nodules with calcium carbonates and it is less fertile.
Khadar Plains: It is a new alluvium. It does not contain the kankar nodules and it is very fertile.

Question 20.
Name any two Ghats of Western Ghats.
Answer:
Thalghat, Bhjorghat, Palghat, Agumbe ghat, Shiradighat, Charmadighat are the major Ghats of the Western Ghats.

Question 21.
Name the two most important seismic zones of India.
Answer:
Zone V: This is the most severe seismic zone and is referred as very high damage Risk zone. The areas are Northeastern states, parts of Jammu Kashmir, Uttarkhand, and Bihar and Kutch region.

Zone IV: This zone is second in severity zone. Northern regions of Jammu and Kashmir, Himachal Pradesh, parts of Bihar, UP, Gujarat, West Bengal.

Question 22.
Name any two factors that cause drought and famine.
Answer:
The main causes for the occurrence of drought and famine are reduction in annual rainfall, long period scarcity of surface and underground water, scarcity of stored water, excess utilization of freshwater. Overgrazing, deforestation. Improper agricultural practice, mining.

III. Answer any eight of the following questions in 25 to 30 sentences each. (8 × 5 = 40)

Question 23.
Explain the important branches of Geography.
Answer:
1. Physical Geography.
The field of physical geography is wide as it includes the study of the entire surface of the earth and also its physical and biological process as well as their morphology. Modern geography has witnessed the development of many branches and some of them even grown into separate disciplines.

Some of the important branches of physical geography are as follows:

• Geomorphology: It is a systematic study of landforms, such as mountains, plateaus, plains, valleys, etc.
• Climatology: Climatology encompasses the study of structure of atmosphere and elements of climates and climatic types and regions.
• Meteorology: The scientific study of atmosphere condition is called meteorology.
• Pedology: It is the scientific study of soil formation, structure, texture, chemical composition and their influence on plant growth.
• Hydrology: Hydrology studies the realm of water over the surface of the earth including oceans, lakes, rivers and other water bodies and its effect on different life.
• Seismology: It is the study of Earthquakes, their effects and distribution.
• Astronomical Geography: It is the study of heavenly bodies of the space like planets, satellites, stars etc in relation to the earth.
• Volcanology: It is the scientific study of tectonic process of volcanoes.
• Astronomical geography: It is the study of heavenly bodies of the space like planets, satellites, stars etc in relation to the earth.
• Bio-geography: It is the systematic study of the distribution of plants and animals.
• Hydrology: The study of water on the earth’s land is known as hydrology.
• Oceanography: The study of waves, tides and currents and the other characteristics of oceans, known as oceanography.

2. Human geography: It deals with man and his activities particularly cultural environment factors on man made factors, Important among them are culture, Society, agriculture, mining, industry, transport forming trade population etc.
Some of the important grander of Human geography are as fallows:

1. Political geography: It deals with spatial unit, people distribution, political behavior, political divisions etc.

2. Economic geography: It refers to basic attributes of the economy such as production, distribution exchange of goods and consumption. It deals with the spatial aspects of production, distribution and consumption and also helps on understanding the most proper location for establishing different human activities.

3. Commercial Geography: It deals with the spatial distribution of trade and commercial practices etc.

4. Population Geography: It helps to understand the distribution, growth density, migration and various other components of population.

Question 24.
How do seasons occur? Explain with neat diagram.
Answer:
Seasons occurs as an effect of earth’s revolution. Seasons refers to periods of a year which have some peculiar climatic conditions. Seasons are caused due to the following.

1. The inclination of the earth’s axis.
2. The parallelism of the earth’s axis
3. Revolution of the earth.

There are four seasons in a year. They are:
1.Summer 2. Autumn 3. Winter 4. Spring. As per the international Calendar, the four seasons have a period of 3 months. From the point of view of the earth’s indication, there are four positions of solstices and equinoxes. So, there are four seasons according to the positions of the earth in one complete revolution around the sun. Those four seasons are:

a. Summer Season: On June 21st the northern hemisphere is tilted towards the sun while the southern hemisphere is tilted away from the sun. The rays of the sun fall vertically on the Tropic Cancer and the areas within the Artistic circle remain in sunlight for all 24 hours. The northern hemisphere has longer days and shorter night. At this time the northern hemisphere has longer days and shorter night. At this time the northern hemisphere enjoys summer season and this portion is called “summer solstice”. Solstice means sun stops.

b. Autumnal Season: On 23rd September the northern hemisphere and the southern hemisphere are equally inclined or tilted towards the sun. The sun rays are vertical at the equator. As a result, the days and night are equal all over the world. At this time, in the northern hemisphere the season is neither hot nor cold. It is a situation between summer and winter seasons. It is called autumn season. At this time in the southern hemisphere, there is spring season. This position of the earth on 23rd September is known as autumnal equinox.

c. Winter Season: On 22nd December the southern hemisphere is inclined or tilted towards the sun, and northern hemisphere is inclined or tilted away from the sun. The sun is vertical at the Tropic of Capricorn, i.e. at 23 lA°S. At this time there is winter season in the northern hemisphere, and summer season in the southern hemisphere. This position is known as winter solstice.

d. Spring Season: On 21st March the northern and southern hemisphere are equally inclined towards the sun. The conditions are similar to those of autumnal equinox. From 21st March to 21st June, the earth is moving on its northern limits. During this period, there is spring season in the northern hemisphere and autumn season in the southern hemisphere. This season lasts for three months and continues with fresh cycle of summer. In India, the beginning of the spring is considered very auspicious and is celebrated as the first day of the year.

Question 25.
What is physical weathering? Explain the factors affecting physical weathering.
Answer:
The disintegration of rocks without any chemical change in their compost in is known as mechanical or physical weathering. The disintegration of rocks occurs mainly due to the influence of temperature variation, frost action, wind action, rainwater, etc.

A. Surface are heated and expand. During the nights the rock surfaces are cooled due to , fall in temperature, rocks contact. The repetition of exemptions and contraction causes tension and stress which leads to cracks in the rocks. Then the rocks disintegrate into i blocks. This process is known as Block disintegration, Rocks are made of different types of minerals.

So the different parts of the same rock mass react differently to temperature. This leads to differential expansion and contraction inside the rocks. The rocks break up into smaller grains. This process of weathering is, called “Granular disintegration”. Due to variat Temperature in the upper and lower layers, the outer layers of rocks peel out into the uric shells. This process of weathering is known as “Exfoliation”.

B. Frost: Rocks are disintegrated due to freezing and thawing of water in the cracks or joints in the rocks. This frost action is more important in the temperate and cold regions. The water present in the cracks of rocks freezes during the night due to fall in temperature below freezing point. When water freezes it expands by 1/10 its volume. It thaws (melts) during the day, due to increase of temperature and it contracts in volume. This alternative freezing and melting of water widens other cracks in the rocks, splits and breaks then into blocks. This is known as frost shattering.

C. Rain: Sometimes, when rain falls suddenly on highly heated rocks in hot desert numerous cracks are developed. This is just like a heated chimney of a lamp, when a drop of water falls on it. The repetition of this mechanism causes disintegration of rocks. In humid region, when torrential rain occurs, the drops strike the rock surface and loosen the particles.

D. Wind: In the deserts the wind blows with greater speed carrying with it sand and rock materials, they collide with each other or strike against the loose rock and cause weathering. In deserts the wind cause this type of weathering on a large scale.

E. Sea waves: Sea waves strike the costal rocks. Repeated striking enlarges the incipient joints. Fractures and cause breaking of rocks into small blocks. Weathering also takes place due to hydraulic pressure, abrasion and attrition caused.

F. Slope: A steep slope helps in weathering. In mountainous and hilly area, sometimes, on account of gravity, blocks of rocks move down the slope while rolling down the slope, they strike against other block and break up into pieces.

G Gravitation: the gravity of Earth makes the huge rocks to roll towards the slope. Rolling rocks strike against each other and break up into pieces.

Question 26.
What is landform? Explain the different types of geomorphic processes.
Answer:
A land form is any natural formation of rock and dirt, found on the earth. A landform can be as. large as a mountain range or as small as a hill. Landforms are natural features of the landscape, natural physical features of the earth’s surface eg. Valleys, plateaus, Mountains, plains, hills loess plains. The minor landforms include hills, ridges, valleys, basin etc. According to Geo-scientist the landforms are formed by the forces acting from the interior and on the surface of the Earth.

The processes carried out by Endogenic and Exogenic forces are called geomorphic processes. Endogenic forces: The internal forces are also known as endogenic forces. These are mainly the land building forces. Diastrophism includes all these processes; that move, elevate or build portions of the earth’s crust.

The internal forces are also known as endogenic forces. Exogenic Forces: The external forces are also known as Exogenic forces. These forces are found on the surface of the Earth, Which bring changes through degradation and aggradations process. River, glacier, wind, sea waves are the major sources of external forces.

Question 27.
Explain the factors influenced on the distribution of temperature.
Answer:
The distribution of temperature on the surface of the earth is not uniform. It varies from. region to region due to various factors. The various factors affecting the distribution of atmospheric temperature are:

a. Latitude or distance from the equator: Places close to the equator have higher temperature and are warmer than places awaylfom the equator This is because the Sun rays reach the Earth after passing rays reach the Earth after passing through the layers of the atmosphere. In the low latitudes the Sun rays are direct and have to travel a lesser extent through the atmosphere. Hence, the heat of these rays is more intense. But in high latitudes the Sun rays are slanting and have to passes through a greater extent of atmosphere.

b. Altitude: Temperature decreases with altitude. This is because the heat absorbing elements are found in lower altitude. So the places near the Earth’s surface are warmer than places higher up. This is because air near the surface is denser and contains gases like carbon dioxide, water vapour and other gases. Temperature decreases with increase in height at an average rate of l°C/165m or 6.4°C/1000m.

c. Distance from the sea: this factor also influence on the distribution of temperature and differential heating of land and water. Land gets heated faster compared to water. Water takes longer time to get heated and to cool than land. Hence during the day when the land gets heated quickly, water takes longer time and remains cool. Therefore, during the day time a land gets more heat than the surrounding water bodies.

d. Ocean currents: It increase or decrease the temperature of the Earth’s surface. Warm ocean currents along the coast make the coastal areas warmer and cold currents reduce the temperature and cool the coastal areas.’ Warm currents can be noticed on the eastern margins of the continents in the middle latitude, while .it is the concurrents flow at the western margins of the continents. Gulf stream a warm currents increases the temperature in the eastern coast of U.S.A and California bold current decreases the temperature of the western coast of U.S.A.

e. Winds: Winds that blow from the lower latitudes are warm and make the places warmer. On the other hand, winds that blow from the higher latitudes are cold and make the places cooler. Winds that blow from the sea bring plenty of rain especially if they are warm winds. While off shore winds hardly bring any rain.

f. Clouds: During the day clouds prevent Insolation from reaching the Earth’s surface. Clouds also prevent three escape of terrestrial’s radiation during the night. Clear sky Permits insolation readily during the day time and allow the rapid escape of terrestrial radiation during the night.

Question 28.
Explain the pressure belts of the world with neat diagram.
Answer:
The distribution of pressure is not equal on the earth’s surface. It changes from palace to place and time to time on the basis of air temperature and rotation of the earth. Any area in the atmosphere where air pressure is higher than in the surrounding areas is called “ High pressure”/ Thee are 4 high pressure belts and 3 low pressure belts on the earth’s surface.

Equatorial Low pressure belt: This belt lies between latitudes 5° N and 5° S. The Sun’s rays are almost vertical on the equator throughout the year. As a result, the temperature is uniformly high and pressure is low throughout the year. It is also known as “Doldrums”. The air gets warm and rises upward. Horizontal movement of air is absent and convectional currents occur. This is the zone of convergence of the trade winds.

Sub tropical high pressure belts: The air ascended in the form of convectional currents from the equatorial region partly descends in the between 30 to 40’ latitudes in both the hemispheres. The descending air has thus formed two high pressure zones known as subtropics high pressure belts. It is the zone from which trade and anti-trade winds originate. This belt is also known as “ horse altitudes’. It is dry and quite stable. The name horse latitude is given by the ancient sailors who used to transport horses on ships. Due to absence of strong winds, some times the ship could not move with horses. Hence sailors used to dump horses to make the ship move forward.

Sub Polar low pressure belts: In between polar high pressure knd sub-tropical high pressure belt, the sum-tropical low pressure belts are situated. They lies in between 60’ to 70’ latitudes in both the hemispheres. They are formed with spinning action of rotation of the earth and also uprising air as an effect of incoming cold polar winds.

Polar high pressure belts: The Polar Regions are characterized with low temperature. The air raised at the equator descends around the poles causing high pressure belts. The cold polar winds blow outward from this zone.

Question 29.
What is wind? Explain the planetary winds with diagram.
Answer:
The horizontal movement of air over the Earth surface is called Wind.

Winds which blow from high pressure belts to the low pressure belts in the same direction through out the year are called planetary winds, permanent winds or prevailing winds. Characteristics: The chief characteristics of planetary winds:

a. They are connected with the pressure belts. So they blow from the high pressure belt or area to the low pressure belt or area.

b. They are regular through out the year.
c. They deflect to their right in the northern hemisphere and to their left in the southern hemisphere.

d. As a result of the shifting of the pressure belt northward in summer and southward in winter, the planetary winds also shift northwards in summer and southwards in winter. They are permanent and blow over vast areas of the globe. These winds include trade winds, westerlies and polar winds.

1. Trade winds: The winds that blow in the tropics form the sub-tropical high pressure belts towards the equatorial low pressure belt are called “Trade winds”. They found approximately between 8° and 30° latitudes on both sides blowing from the east. They are also known as “Tropical Easterlies”.

The trade winds due to the law of deflection blow from the north-east in the northern hemisphere and from south-east in the southern hemisphere. Trade winds blow from the cooler sub-tropical areas to the hotter area, hence they do not bring rain. However, when they blow over the open sea they gather moisture and bring heavy rainfall to the east coast of the continents.

2. Anti trade winds: The wind blowing from sub-tropical high pressure belts towards sub-polar low pressure belts are known as anti-trade winds. They are south-west to north east in the northern hemisphere and Norwest to south-east in the southern hemisphere.

Hence they are called ‘Westerlies”. They prevail largely between 40° and 650 north and south of the equator. They blow from the north-west in the southern hemisphere and south – west in the northern hemisphere. As they blow from hotter areas to colder areas they bring rain through the year.

3. Polar winds: Winds blowing from polar high pressure belts toward the sub-polar low pressure belts are known as polar winds. They blow from the north east in the northern hemisphere and south east in the southern hemisphere. As they blow form the snow cov4red areas they are very cold winds. They are constant in the southern hemisphere.

Question 30.
What is conservation of ocean? Mention the measures of conservation of ocean.
Answer:

Conservation of ocean means rational uses of ocean resources. So that a harmony between man’s ocean resource requirements and their availability could be maintained. The rational uses of ocean resources by the present generation and the preservation of ocean resources for the future generations, is known as conservation of ocean. It also means the protection of oceans and ocean resources against pollution caused by dumping of oceans and of industrial, agricultural and municipal wastes into oceans by man, oil spill from oil tankers, and nuclear explosions in sea and oceans.

Need for conservation of Oceans: There is a need for conservation of oceans due to the following reasons:

• If oceans are not conserved, all the living organism in the oceans either die or become unsuitable for human consumption.
• Oceans are the storehouse of pearls, corals and sponges. These resources have to be conserved.
• Oceans have oil and natural gas reserves. These reserves have to be conserved.
• Oceans are rich in minerals. These mineral resources have to be rationally exploited.
• Oceans allow the growth of innumerable species of plants. These plants have to be conserved.
• Oceans are the breeding centers of marine fisheries. Thousands of fishes are found in oceans. The marine fishery resources should be exploited rationally.
• Literacy and education programmes on marine features must be initiated and promoted.
• Proper law to be enacted to save sea and ocean.

World wise awareness programme must be arranged to show the pro and cons of the marine pollution etc.

Question 31.
Divide India into Physical divisions and explain and explain the Himalayan Mountains.
Answer:
India is characterized by great diversity in its physical features. On the basis of physiography, the country is divided in to four major physical divisions. They are:

1. The Northern Mountains
2. The Northern Plains
3. The Peninsular Plateau
4. The Coastal Plains and Islands

The Himalayas: This is loftiest and snow covered mountains in the world. The area occupied by the Himalayas was earlier a part of ‘Tethys Sea’. The formation of this mountain is by tectonic forces of Gondawana land Angara land masses. It is situated to the north of the Indus and Ganga and the Brahmaputra plains.. The slopes of the Himalayas are gentle towards the north and steep towards south.

The Himalayas have distinct characteristics of high relief, snow covered peaks, complex geographical structures, parallel separated by deep valleys and rich temperate vegetation.The Himalayas are classified into three parallel ranges based on altitude and latitude.

The Great Himalayas or Himadri The lesser Himalayas or Himachal The Outer Himalayas or Siwaliks.

a. The Great Himalayas or Himadri: These are the inner most loftiest and continuous ranges of mountains. The average height of the Great Himalayas is 6200 m and the width varies between 120 and 190 km. The important peaks of great Himalayas in India are, Kanchenjunga-8598m in Sikkim, Nanga Prabat-8126m, Nandadevi, Badrinath, Karmet, Trishuletc.

b. The lesser Himalayas or Himachal: These ranges are also known as Inner Himalayas or Himachal ranges. It is situated between great Himalayas inn the north and Outer Himalayas or Siwaliks in the south. Its average height is around 1500-4500m and the width is about 60 to 80 km. These are very rugged and complex ranges due to erosion by rivers. The important ranges in Lesser Himalayas are Pirpanjal, Dhaul Dhar and nag- tiba etc. The important Hill stations are Shimla, Musooire, Ranikeht, Nainital, Almora, Chakrata, Darjeeling etc. Kulu valley, Kangra valley, Spiti valley are the famous valleys of Himachal.

c. The Outer Himalayas or Siwaliks: These are the outer most ranges situated to the south of Lesser Himalayas, known as Siwaliks. The Siwaliks extend from Jammu & Kashmir in the North West to Arunachal Pradesh in east. The average height of this range is around 600-1500m and its width varies between 15-5Qklm. The siwaliks are formed from the sediments brought down by the rivers of lesser, and Greater Himalayas.

There are flat floored structure valleys between Siwaliks and Lesser Himalayas, Known as Siwaliks. The Siwaliks extend from Jammu&Kashmir in the North West to Arunchal Pradesh in east.

Question 32.
Briefly explain the importance of Inter-linking of rivers of India.
Answer:
The distribution of rainfall in India is highly uneven and seasonal. The Himalayan rivers are perennial while the peninsular rivers are seasonal. During rainy season, much of the water is lost in floods and wasteful flow into the sea. But in other seasons there is scarcity of water.

Even in India some parts get more rainfall and some other parts get very low rainfall. Consequently there are floods in one region and drought and famine in other regions in the country. The problems of floods and drought can be minimized through the inter-river linkages or through national water grid, under which water from one river basin can be transferred to another river basin for optimum utilization.

The inter-link would consist of two parts, a northern Himalayan River Development component and a southern peninsular river development component. The northern component would consist of series of dams built along the Ganga and Brahmaputra rivers in India, for the purposes of storage, canals would be built to transfer surplus water from the astern tributaries of the Ganga to the west. The Brahmaputra and its tributaries would be linked with the Ganga and the Ganga with the Mahanadi river. This part of the project would provide additional irrigation and generate electricity.

Question 33.
Explain the southwest monsoon winds of India with diagram.
Answer:
The south-west monsoon winds as starts in June and ends in mid-September. It is also known as advancing monsoon season or rainy season. During this season, India gets more than 75% of its annual rainfall and more than 90% of the country’s area receives downpour. It is the prime season for Kharif crops.

In the middle of June the direct rays of the Sun fall on tropic of caner due to shift in the position of the Sun from Equator towards northern hemisphere. Therefore, there is an increase in temperature from south to north. The temperature in the main land of India and nearby land masses is high compared to water bodies of the Indian Ocean.

a. The Arabian Sea branch: The Arabian Sea branch of the south-west monsoon strikes the western coast of India in Kerala on the 1st June. Arabian sea winds by carrying more moisture blow along the western coast of India and cause heavy rainfall in the western part of Western Ghats due to obstruction. These winds behave like sea breeze and cause continuous rainfall I the wind ward side of the Western Ghats tHl they lose their moisture.

Agumbe of Karnataka receives the highest rainfall during this season. This regions coming under southeast monsoon winds receive good rainfall wherever they get obstruction by hills and plateaus.

b. The Bay of Bengal branch blow from water bodies towards the Indian mainland due to variation in pressure. These winds carry moisture form the Bay of Bengl and blow along eastern coast and finally reach north eastern hills. In its path, whenever this wind receives obstruction, they cause good rainfall. The eastern part of Eastern Ghats and north astern hills receive heavy rainfall. These winds after crossing eastern coast merge the Arabian sea winds.

The Arabian Sea and the Bay of Bengal winds, after merging, blow towards north eastern regions of India. The shape of the Himalayan Mountains and northeastern hills greatly obstruct these winds. Therefore the Meghalaya plateau region, particularly Nokrek areas of Mawsynram and cheerapunji, receive very high rainfall. This place is popularly called Rainiest or wettest place on the Earth.

The southwest monsoon after crossing northeastern region blow towards east. Since the Himalayas obstruct these winds they have to take westerly direction and blow along the foothills of Himalayas. The shift in the direct6 sun rays from Tropic of Cancer towards Equator results in the gradual disappearance of southwest monsoons. Indian economy depends on the Monsoons to a large extent.

Question 34.
Explain the erosion and conservation of soil.
Answer:
These forests are found in the regions of heavy rainfall (above 250 cm) and high temperature (above 27° C) Tall umbrella shaped trees with dense assemblage is a prominent feature of this forest. The evergreen forests always look green because, various species of trees are found here and they shed leaves in different seasons.

IV. Answer any one of the following. (1 × 10 = 10)

Question 35.
Explain the structure and composition of the earth with a neat diagram.
Answer:

On the basis of the physical and chemical properties of the earth’s surface, behavioral patterns of seismic waves of earthquakes and the lava erupted form volcanoes, it is generally held that the earth is composed of three layers or parts.

1. The crust: The outer or upper most layer of the earth is the crust. It is solid and is the thinnest and lightest part. It is 6to 60 kms thick. It has two layers.
a. Continental crust or sial: The upper part consist of sedimentary and granite rocks’ and forms the continents. Its major constituent elements are silica and aluminum. So, it is termed as sial. Its average thickness ranges between 10-12 km.

b. Oceanic crust or Sima: The lower part of other Crust is known as oceanic crust. Its thickness is around 5 km. This layer is rich in silica and Magnesium. Therefore, it is called Sima. The lower continuous layer is mostly composing of silica and magnesium and so it is termed as sima. The mean density of this layer is 2.95gm. Conrad discontinuity between Sial and Sima and Mohorovicic discontinuity between Crust and Mantle are the major discontinues in the crust.

2. The Mantle: The portion of the earth’s interior, lying beneath the crust and above the core is known as mantle. It is largely made up of basic silicates, rich in iron and magnesium. It extends from 60 to 2,900km. The density of this layer from 3.3 to 5.7gm. The mantle has two parts.

a. Upper Mantle: This is the outer layer of the Mantle known as Asthenosphre. Most of the earthquakes and volcanoes take birth due to disorder in this layer.

b. Lower Mantle: This is the lower layer of the Mantle known as Mesosphere and it is in solid form. Repetti discontinuity between Asthenosphere and Mesosphere and Gutenberg discontinuity between Mantle and Core are the major discontinues in the mantle

3. The core: The core is the central part of the earth’s interior. It extends from the lower boundary of the mantle to the centre of the earth for about 6,400 kms. The most important materials of core are nickel and ferrous (Nife). The core consists of two layers, namely.

a. Outer core: It is the outer layer of the Core consisting hard molten rocks. Most of the materials are in molten form. It extends from 2900km to 4980km.

b. Inner core: It is the lower layer of the Core with very high temperature and pressure. Most of the materials are in solid form therefore, it is called solid core. The average temperature of this layer is around 2900° C. Transition discontinuity is found between Outer. Core and Inner Core.

Question 36.
What, is a river? Explain the landforms created by the work of a river with neat diagrams.
Answer:
River is an important external agent of denudation on the ever-changing face of the Earth. The work of river is more or less common in all the drainage systems of the world.
The work of river consists of three closely interrelated activities.

1. Erosional work: The process of wearing and taking away the part of rock is known as ‘Erosion’. It depends upon the volume and velocity of water, nature of slope and the nature of rocks. The erosional work of the river is performed in two ways.
a. The Mechanical and b. The Chemical erosion.
There are various landforms associated to erosional work of river.

a. ’V’ Shaped valley: In the mountain course the speed of the river is greater and volume is less. As the water rushes down the steep slopes there is maximum vertical , or later erosion. The rapid down cutting or vertical erosion results in the formation of ‘V’shaped valley.

b. Gorge: A deep and narrow valley with steep rocky, sides in the river course is known as ‘Gorge’. They are formed by the regular vertical cutting by the rivers in the valleys eg. Narmada gorge.

c. I shape valley: Avey steep, deep river valley formed by the river, lookinglike T, is called ‘I’ Shaped valley. These are very deep compared to gorges.

d. Canyon: It is a wide, deep and steep valley almost with vertical walls like feature found in the arid or semi arid regions is called ‘Canyon’ eg. Grand Canyon of River Colorado in USA.

e. Potholes: These are the small depressions in the rocky beds of other river valley. They are formed by corrosion. Pebbles, sand and small rocks carried by the river swirled around on the river bed. This action erodes the rock on the river bed forming potholes.

f. Waterfalls: Huge volume of water falling from a great height along the course of a river is called “Waterfalls’. They are formed when the hard and soft rocks come in the way of flowing river. The soft rock gets eroded faster and hard rock does not erode easily. Therefore huge amount of water falls from great height and creates waterfalls. Eg. The Jog falls, The Angel falls, The Victoria falls.

g. River Capture: It is formed mainly due to head-ward erosion by the river near its source. When the source of a river is captured by another major and strong river it is called‘River Capture’.

2. Transportational work: The process of carrying away the eroded materials is known as ‘Transportation’. The rock materials and eroded particles carried by a river is called its Load. The transportation capacity of a river is based on velocity of water, volume of water, load, slope, smooth valley floor etc.

The major landforms associated with the transportational work of the river are:

a. Alluvial fans: The term alluvium refers to the debris transported and deposited by rivers. When the fast flowing river enters the plateau or plain region, it experience sudden decline in gradient and obstruction in its path. Due to obstruction of the river spreads and deposits many of its light materials in fan shape known as ‘alluvial fans’.

b. Alluvial cones: In the plateau and foot hill region when the river spreads out, the eroded materials carried by the river is deposited in conical shape called ‘Alluvial cones’.

3. Depositional work: The process of carrying and accumulating the eroded materials by the river at the lower course is called ‘deposition’. In the lower course due to gentle slope the river slows down and deposits most of its materials on the banks, course and the mouth.

The important landforms resulting from depositional work of the river are:

a. Meanders: In the lower course, river flows slowly in zig zag or curved manner due . to smaller obstruction in its path. A curve or loop formed by the river in its path is called ‘Meander’. When the river course formed by such crescent shaped loops due to continuous lateral deposition it is called meandering course.

b. Ox-bow Lakes: The ox-bow lakes are formed by depositional and erosional actions taking place simultaneously and they are a result of excessive meandering. The River which flows through the shorter route leaving the curve of the meander cut off and crescent shaped lake is formed known as‘Ox-bow lakes’.

c. Flood Plains: When the river is in floods the water overflows on its bank and spreads in the surrounding regions. The silt carried by the water gets deposited in these areas and creates flat plains on both the banks of the rive known as ‘Flood Plains’.

d. Delta: A triangular shaped alluvial deposition forced at the mouth of the river is called ‘Delta’. Important types of deltas are

a. Arcuate or Common delta
b. Bird-foot delta

e. Distributaries: As the river approaches the sea or Ocean, due to reduction in gradient, joining of tributaries, its volume increases, speed decreases hence, the rivet begins to break up into a number of branches from the main river called ‘Distributaries’.

f. Estuary: Estuaries are the tidal mouth of a river having a narrow, gradually widening lay at the mouth. In Estuary River water is mixed with seawater. Eg. The Narmada estuary, The Kali estuary.

V. A. Answer the following in a sentence each : (5 × 1 = 5)

Question 37.
What is Cartography?
Answer:
The Systematic study and practice of making maps.

Question 38.
What is Map?
Answer:
A part or whole of the Earth drawn on a paper according to scale is called a map.

Question 39.
What is a scale?
Answer:
A scale is a ratio between any two points on the ground surface and their.corresponding distance on the map.

Question 40.
What is a large scale map?
Answer:
The Map that are drawn on the scale of 1 cm = 1 km or 1: 1,00,000 is known as large scale maps.

Question 41.
Give examples for small scale map.
Answer:
Atlas and wall maps.

B. Write the latitude and longitude for the given places. (5 × 1 = 5)

Question 42.
Mangalore
Answer:
12° 51’ Nto 74°50’ E

Question 43. Bengaluru
Answer:
13° N to 77°35’ E

Question 44.
Belgautn
Answer:
15° 52’ N to 74°30’ E

Question 45.
Mysore
Answer:
12° 18’ N to 76°38’ E

Question 46.
Hubli
Answer:
15° 21’ N to 75°10’ E

C. Draw diagram to the following. (2 × 2 = 4)

Question 47.
Volcanos
Answer:
Various types of landforms are produced by the volcanoes. They can be grouped into

1. Extrusive landforms
2. Intrusive landforms

1. Extrusive landforms: The landforms which have been formed due to the accumulation and solidification of lava and other materials given out by volcanoes are known as extrusive landforms. The important extrusive land forms are:

a. Volcanic cones: volcanic cones are the most typical form of extrusive features or landforms.

The lava and other ejected materials that reach the surface of the earth are accumulated around the crater, and cones are formed. The formation of cones depends jupon the nature of explosion and the materials emitted out of it. There fore, cones are various types. They are:

• Cinder cones: A volcanic cone formed by volcanic cinder accumulated around the crates is called cinder cone.
• Ash cone: A cone shaped hill formed by of volcanic ash that is built up around a volcanic ent is called ash cone.
• Composite cone: A volcanic cone composed of alternative layers of ash, cinder and lava is called composite cone.
• Parasite cone: Some times, many smaller cones are developed in the neighborhood of the main cone. They are called parasite cone.

b. Crater: A crater is pit at the top of volcanic vent, during volcanic eruption, materials form the top of the cone are blown off and a bowl- shaped depression is formed. It is known as crater.
Caldera: Sometime a violent explosion blow away the original cone and forms a large basin-shaped depression called caldera
Volcanic spine: The acid lava, which is vicious, solidifies quickly and blocks the vent. This stands up as a steep-sided cone called spine or plug.
Lava dome: The shape of lava dome is determined by the nature of lava. The highly fluid basic lava builds up shield dome with gently rising slopes, and flattened top. The basic lava, which is highly viscous, builds up dome with a great height and steep slope
Lava plateau: An extensive elevated land made up of depositional lava called lava plateau.

2. Intrusive land forms: Intrusive landforms occur when lava solidifies with the earth’s. crust and gives rise to various shapes or forms. Intrusive landforms are formed along the bedding planes of sedimentary rocks. There are various forms of intrusive landforms. They are:

Dyke: The Magma from the interior of the earth finds its way towards the surface through a passage. When it is able to reach the surface, it cools and solidifies, and a vertical or highly inclined feature is formed, and such a features is called dyke.
Sill: A sheet of magma which lies along the bedding plan is called sill.
Laccolith: Laccolith is a large mound of igneous rock formed along a bedding plane in the sedimentary rock layers.
Batholith: Batholith is a very large dome – shaped intrusion of igneous rock. It is exposed to the surface only after considerable erosion.

Hot springs or thermal spring’s are more common. The water sinks deep inside where the rocks are heated. The heated water rises to the surface without any explosion. Such springs contain dissolved minerals which are of medicinal value. They can be also used to generate electricity. Iceland has thousands of hot springs. A Geyser is a hot spring form which a column of hot water and stream are alternatively ejected to a great height.

Question 48.
Tides
Answer:
Orographic rainfall

D. Draw the outline map of India, mark and name the following (2 × 3 = 6)

Question 49.
Draw the map of India
Answer:
Physical divisions of India

Question 50.
Flood-prone regions of India
Answer:
Forests in India

Question 51.
Western Ghats and Eastern Ghats.
Answer:
Rivers and Lakes

Students can Download 1st PUC Geography Model Question Paper 2 with Answers, Karnataka 1st PUC Geography Model Question Papers with Answers helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka 1st PUC Geography Model Question Paper 2 with Answers

Time: 3 Hrs
Max. Marks: 100

Note:

1. Answer all questions.
2. Draw maps and diagrams wherever necessary
3. Questions No.V is on Cartography.

I. Answer the following in a word or a sentence each. ( 1 × 10 = 10 )

Question 1.
Who conducted Bed ford level experiment?
Answer:
Dr. Alfred Russel Wallace conducted Bed ford level experiment in 1956, along the Bed ford level canal area in Britain.

Question 2.
What is the total geographical area of the Earth?
Answer:
510 millionsq.km.

Question 3.
Give an example for Plutonic Rock.
Answer:
The rocks which are formed due to cooling of magma at a great deapth inside the earth called Plutonic igneous rocks.

Question 4.
Define Petrology.
Answer:
The scientific study of rocks is called ‘Petrology’.

Question 5.
What is weathering?
Answer:
The process of disintegration and decomposition of rocks is known as weathering.

Question 6.
Define Insolation.
Answer:
A small proportion of solar radiation which reaches the earth is called Insolation.

Question 7.
What is Salinity?
It refers to the amount of dissolve solifds in the ocean water. In other words , the amount of salts in the ocean water.

Question 8.
What is the total geographical area of India?
Answer:
Total geographical area of India is 32,87,263 sq.km.

Question 9.
Name the longest and the largest glacier of India.
Answer:
Siachen.

Question 10.
Define Pedology?
Answer:
The scientific study of soil is known as Pedology.

II. Answer any ten of the following in two or three sentence each. ( 2 × 10 = 20 )

Question 11.
What is Oceanography?
Answer:
The scientific study of water bodies (Sea, Oceans) is called ‘Oceanography’.

Question 12.
What is inclination of the Earth?
Answer:
The Earth’s axis is not at right angle (perpendicular) to the plane of the elliptical orbit. The axis is inclined at an angle of 66 1/2° to the plane of the orbit. This is known as ‘Inclination of the Earth’s axis’.

Question 13.
State the difference between Focus and Epicentre.
Answer:
The point in the interior of the Earth from where the earthquake tremors originate is called the seismic focus. Earthquake tremors move from the focus in all directions.
The point o the Earth’s surface vertically above the focus is called the epicenter. The Earthquake is felt first at the epicenter.

Question 14.
What is canyon? Give example.
Answer:
Deep valleys with step, almost vertical walls are called canyons
Waterfall: A vertical drop of water from a great height along the course of a river is called a waterfall.

Question 15.
Name the two important Trade winds.
Answer:
North East Trade winds: In the northern hemisphere, they blow from north-east to south west. South East trade winds: In the southern hemisphere, they blow from south east to North West.

Question 16.
Mention any four uses of tides.
Answer:
Tides are useful to man and a society in various ways. They are:

1. Tides increase the depth of water in shallow harbours and help navigation during high ties.
2. Tides clean the entrance of ports, harbours and river mouths.
3. Tides help fishing and other aquaculture activities.
4. Tides promote salt and foam production in the coastal areas.
5. Tides promote the generation of tidal energy

Question 17.
What is Ecological Balance?
Answer:
It refers to the proper balance between the different organisms and their physical environment in the biosphere.

Question 18.
Name the four tributaries of river Indus.
Answer:
The Sutlej, Ravi, Jhelum, Chenab and the Beas are the major tributaries of Indus river.

Question 19.
Name any four factors that affect Soil erosion.
Answer:
High Temperature, Rainfall wind and waves are the natural agents. Deforestation, over grazing, shifting cultivation, unscientific methods of agriculture cause soil erosion.

Question 20.
State two important flood prone areas of the country.
Answer:
The Ganga Basin: The badly affected states of the Ganga basin area Uttar Pradesh, Bihar and West Bengal.
The Brahmaputra basin: the Brahmaputra along with its tributaries floods the areas of Assam • and North West Bengal regions.

Question 21.
Mention any four causes of Earthquakes.
Answer:
An earthquake is a sudden release of energy accumulated in rocks causing the ground to tremble or shake. .
The main causes of earthquake are natural and man – made factors.

• Tectonic forces
• Volcanic activity
• Landslides and Landslips
• Collapse of underground cave roofs

Question 22.
Mention the important regions of land slides in India.
Answer:
There are three important region.

1. Himalayan zone
2. Western Ghats
3. Southern Plateau.

III. Answer any eight of the following in 25 to 30 sentences each. ( 5 × 8 = 40 )

Question 23.
Why is Geography called as the ‘Science of Earth’?
Answer:
The word Geography is derived from the two Greek word ‘Geo’ which means earth and Graphic which means writing or study. Thus literally Geography means writing or study about the earth. Geography not only deals with a description of the earth, but it also deals with its inhabitants. So, Geography is the study of the earth and its people.

Question 24.
Describe the size of the Earth.
Answer:
The ancient people made attempts to determine the size of the Earth. About 2,000 years ago a Greek astronomer, Eratosthenes, who lived In Alexandria in Egypt succeeded in calculating the size of the earth almost accurately, according to him, the earth’s circumference at the equator was 41,140kms. It was very close to the actual circumference of the earth, as known today.

The actual equatorial circumference of the earth is 40,076km, where as the polar circumference is 40,006km. The difference between the two is 70km. The earth’s equatorial diameter is 12,757km and the polar diameter is 12,714km. The difference is 43km. The geoids shape of the earth makes the circumference through the poles little less than that along the equator. The total surface area of the earth is 510. 9 million sq kms of the surface area, 71 % is covered by water mass and 29% is covered by landmass. The water mass is 361 million sq.kms and the land area is 149 million sq.kms. The land area is divided into seven continents and many island. The continents are Asia, Africa, and North America, South America, Antarctica, Europe and Australia.

The water area consist of five ocean, namely, the pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Antarctic ocean and the Arctic Ocean and many gulfs, bays and seas. The globe is divided into two hemispheres, namely the northern hemisphere and the southern hemisphere, by the equator. The northern hemisphere contains 2/3 of the land and the southern hemisphere contains 1/3 of the land. The zero degree meridians decide the globe into two hemispheres, namely, the eastern hemisphere and the western hemisphere.

Question 25.
What is an Earthquake? Describe the causes and effects of earthquake.
Answer:
An Earthquake is a sudden vibration or oscillation in the Crust of the Earth. It is a form of energy of wave motion transmitted through the surface layer of the Earth. The place of origin of an Earthquake in the Earth’s crust is called ‘Focus’. The point on the Earth surface which is perpendicular to the focus, receiving seismic waves is called ‘Epicentre’.

Causes of Earthquake: On the basis of occurrence earthquakes can be classified into three types. They occur due to several causes such as tectonic forces, folding, faulting, volcanic eruptions landslides, avalanches, man-made factor.

Tectonic Earthquakes: These are caused due to folding, faulting and displacement of blocks of rocks in the Earth’s crust. They are highly intensive and destructive seismic activities.

Volcanic Earthquakes: These are associated with the volcanic activities and are usually caused at great depths. They are with low intensity and magnitude. The destruction and damage are slightly lesser than earthquakes caused by Tectonic forces.

c. Earthquakes caused by man-made factors: Over interaction of man underground nuclear explosion etc, are causing great change in the crustal formation leading to seismic activity. E.g. Koyna dam (India)-1967, Hoover dam (U.S.A)-l 935, Mangladam (Pakistan). Effects of Earthquakes: Earthquakes cause violent disturbances and widespread damage and destruction, especially on the epicentre region.

• Earthquakes cause changes in the earth’s surface. Cracks and fissures develop in the earth’s crust.
• Vibrations, caused by earthquakes, lead to landslides in mountainous regions, damming the rivers.
• vertical or horizontal cracks are formed, and the land is elevated or lowered, forming lakes.
• Deep cracks may be developed in dams after the earthquake. For instance, deep cracks were developed in the Koyna dam after the earthquake.
• The beds of rivers may be raised by the earthquakes. For example, the bed of the river Brahmaputra was raised during the Assam earthquakes.
• here is the greatest danger of falling of houses, roads railway lines factories, bridges, dams, aerodromes, and other man-made structures, resulting in loss of life and property.
• The underground water system is disturbed.

Question 26.
What is a rock? Describe the different types of rocks.
Answer:
Rock refers to the hard and resistant materials of the earth’s crust. But scientifically rock includes even soft and loose materials like chalk, clay, etc. So, rock refers to any solid materials, hard or soft of which the crust of the earth is formed. All rocks do not have the same chemical composition. But minerals have their own chemical compost in and physical prosperities. .The earth’s crust is made up of various types of rocks

Types of Rocks: Rocks can be classified into three major groups on the basis of their origin or mode of formation. They are:

A. Igneous rocks: The term Igneous is derived from the Latin word “Ignis”, means lire. Thus the igneous rocks are formed by the cooling and solidification of molten material which is called magma. Igneous rocks are also called primary rocks, because they were the firs to be formed. As they are the rocks from which all other types of rocks are derived, they are also called parent rocks.
Igneous rocks are commonly classified on the basis of mode of formation into two major types.

i. Intrusive rocks
ii. Extrusive rocks.

I. Intrusive rocks: The magma cannpt escape out to the earth’s surface, it cols slowly inside the earth’s crust and hardens into rock. This type of rock is known as Intrusive Igneous rock. E.g. Granite and dolerite. These rocks can be divided into two type’s a. Plutonic rocks and b. Hybabyssal rocks.

a. Plutonic rocks: The rocks which are formed due to cooling of magma at great depth inside the earth are called Plutonic igneous rocks.
b. Hybabyssal rocks: These are intermediate rocks between the extruded volcanic rocks and the deep plutonic rocks. They are formed due to cooling and solidification of magma in cracks, pores, crevices etc.

II. Extrusive rocks: Rocks formed by cooling and solidification of lava on the surface of the Earth is called extrusive igneous rocks. E.g. Basalt.

B. Sedimentary Rocks: These rocks which are formed due to aggregation and compactness
of sediments are known as sedimentary. In other words, sedimentary rocks are formed bye day the deposition of sediments derived form older rocks, planets and animals remains by river, winds, glaciers etc and these sediments are hardened into rocks by pressure. As they are formed by the consolidation of sediments. They are called sedimentary rocks. They are also called stratified rocks,

a. Mechanically-formed rocks: The rock which have been formed form the accumulation of rock materials, derived form other rocks and have been cemented together are known as “ Mechanically formed rocks.” The mechanically formed rocks consist of sediments which have been carried and deposited by rivers, glaciers, winds or waves and cemented together with clay or line. On the basis of rock materials. These rocks can be divided into three main categories. They are: Rudaceous rocks, Arernaceous rocks and Argilious rocks.

b. Chemically formed rocks: The chemical often settle down and hardened to form rocks known as chemically formed rocks. For example: Gypsum and rock salt, running water dissolves and carries chemicals and where evaporation takes place, these chemicals are deposited at the mouth of springs, caves or caverns or in lakes. Rock salt and gypsum are formed form deposit of salt in strata on the beds of lakes.

c. Organically formed rocks: Organic rocks are formed form the remains of organisms, i.e. of animals and plants. Examples: coal, limestone etc. On the basis of lime and carbon content, organically formed rocks can be divided into two kinds, namely.

(i) Calcareous rocks: Calcareous rocks are formed mostly from the remains of living organisms. These rocks contain calcium carbonate or lime. They include limestoneand chalk. They are porous and soluble.

(ii) Carbonaceous rocks: These are formed due to the transformation of vegetative matter. Under the impact of heat and pressure the remains of plants are turned into hard layers. E.g. coal.

C. Metamorphic rocks: Rock which has been changes either in form or in composition without disintegration is called metamorphic rocks. These rocks are metamorphosed from igneous sedimentary rocks. Igneous and sedimentary rocks may undergo chemical and physical changes because of pressure and heat and form metamorphic rocks. The intense heat and pressure in the earth’s curst alters the composition and appearance of rocks completely or partially to produce a new type of rocks. In this manner metamorphic. rocks are formed. Marble, Diamond, Quartzite, Ruby, Emerald are the examples of metamorphic rock.

Question 27.
What is landform? Explain the different types of geomorphic processes.
Answer:
A land form is any natural formation of rock and dirt, found on the earth. A landform can be as. large as a mountain range or as small as a hill. Landforms are natural features of the landscape, natural physical features of the earth’s surface eg. Valleys, plateaus, Mountains, plains, hills loess plains. The minor landforms include hills, ridges, valleys, basin etc. According to Geo-scientist the landforms are formed by the forces acting from the interior and on the surface of the Earth.

The processes carried out by Endogenic and Exogenic forces are called geomorphic processes. Endogenic forces: The internal forces are also known as endogenic forces. These are mainly the land building forces. Diastrophism includes all these processes; that move, elevate or build portions of the earth’s crust.

The internal forces are also known as endogenic forces. Exogenic Forces: The external forces are also known as Exogenic forces. These forces are found on the surface of the Earth, Which bring changes through degradation and aggradations process. River, glacier, wind, sea waves are the major sources of external forces.

Question 28.
Explain Biological weathering with examples.
Answer:
The disintegration of rocks caused by plants, animals and human beings is called “Biological Weathering”.
(a) Plants: The roots of the plant grow through soil and in the cracks of rocks to find water and minerals. As the roots grow deep in the rock they widen and disintegrate the rocks. This process is rn’ost prominent in thick forests and vegetative regions.

(b) Animals: The burrowing animals like rats, rabbits, ants, earthworms and termites influence in the breaking up of rocks and make passages below the ground. The seepage of air and water through these passage results in rapid weathering of rocks.

(c) Human beings: Human beings play an important role weathering of rocks, through activities like agriculture, mining quarrying, oil drilling, deforestation etc.

Question 29.
Briefly explain the factors affecting the distribution of temperature.
Answer:
The distribution of temperature on the surface of the earth is not uniform. It varies from. region to region due to various factors. The various factors affecting the distribution of atmospheric temperature are:

a. Latitude or distance from the equator: Places close to the equator have higher temperature and are warmer than places awaylfom the equator This is because the Sun rays reach the Earth after passing rays reach the Earth after passing through the layers of the atmosphere. In the low latitudes the Sun rays are direct and have to travel a lesser extent through the atmosphere. Hence, the heat of these rays is more intense. But in high latitudes the Sun rays are slanting and have to passes through a greater extent of atmosphere.

b. Altitude: Temperature decreases with altitude. This is because the heat absorbing elements are found in lower altitude. So the places near the Earth’s surface are warmer than places higher up. This is because air near the surface is denser and contains gases like carbon dioxide, water vapour and other gases. Temperature decreases with increase in height at an average rate of l°C/165m or 6.4°C/1000m.

c. Distance from the sea: this factor also influence on the distribution of temperature and differential heating of land and water. Land gets heated faster compared to water. Water takes longer time to get heated and to cool than land. Hence during the day when the land gets heated quickly, water takes longer time and remains cool. Therefore, during the day time a land gets more heat than the surrounding water bodies.

d. Ocean currents: It increase or decrease the temperature of the Earth’s surface. Warm ocean currents along the coast make the coastal areas warmer and cold currents reduce the temperature and cool the coastal areas.’ Warm currents can be noticed on the eastern margins of the continents in the middle latitude, while .it is the concurrents flow at the western margins of the continents. Gulf stream a warm currents increases the temperature in the eastern coast of U.S.A and California bold current decreases the temperature of the western coast of U.S.A.

e. Winds: Winds that blow from the lower latitudes are warm and make the places warmer. On the other hand, winds that blow from the higher latitudes are cold and make the places cooler. Winds that blow from the sea bring plenty of rain especially if they are warm winds. While off shore winds hardly bring any rain.

f. Clouds: During the day clouds prevent Insolation from reaching the Earth’s surface. Clouds also prevent three escape of terrestrial’s radiation during the night. Clear sky Permits insolation readily during the day time and allow the rapid escape of terrestrial radiation during the night.

Question 30.
Briefly explain the biomes.
Answer:
A distinct group of life forms and the environment in which they are found is called ‘Biomes’. In other words, Biome is a plant and animal community that covers a large geographical area. On the basis of the dominant life form, six major biomes are identified.

a. Forest biomes: Trees are the dominant life form of forest biome. High temperature, humid climate and soil moisture help for thick tree cover. Equatorial region is dominant with forest biome.

b. Savanna biome: It is the transitional biome between the forest biome and grassland biome. Savanna biome comprises of trees with grasses and herbs. It occupies areas of low and seasonal rainfall.

c. Grassland biome: in this biome grasses constitute the dominant vegetation. It is dominant in the moderate soil water deficit regions, semi-arid areas of dry tropical, sub-tropical and mid-latitude regions.

d. Desert biome: It includes organisms capable of surviving in moderate to severe water deficit for most of the year. In this region temperature may range from hot to cool. Most common plants found in this belt are xerophytes.

e. Tundra biome: It includes small plants that can grow quickly during a short warm to cool summer season, in the low temperature and high latitudinal areas.

f. Aquatic biome: Aquatic regions house numerous species of plants and animals, both large and small. This is where life began billions of years ago. Without water, most life forms would be unable to sustain themselves and the Earth would be a barren, desert-like place. Ponds, lakes, rivers, wetlands and oceans are sources of aquatic biomes.

Question 31.
Explain the location, size and frontiers of India.
Answer:
Location: The main land oflndia extends between 8°4’ N to 37°6’N latitude and 68° 7’ Eto 97°23 E longitude. The latitudinal and longitudinal extent oflndia is around 30° The country stretches to 3214 km from North to South and 2933 km from West to East. The northern tip of India is recognized as ‘Indira Col’ in Jammu & Kashmir while, the southern tip (main land) is ‘Kanyakumari’ or ‘Cape Camorin’ in Tamilnadu. In the same way the western and eastern tips of the country are ‘Rann of Kutch’ in Gujarat and ‘Luhit’ in Arunachal Pradesh respectively.

The territorial limit oflndia extends up to 6° 45’ N latitude. ‘Indira point’ situated at this latitude in Great Nicobar Islands. As a peninsular country India has both land and water frontiers. The total length of land frontier of the country is 15,200 km. The mainland of the country has a coast line of 6,100km including the islands. The total length of the coast line of the country is about 7516km. The territorial water extends into the sea to a distance of 12 nautical miles (22.2km) from the coastal baseline.

India is a peninsula, located at the north tip of the Indian Ocean. It is bordered by the Arabian Sea in the west, Indian Ocean in the south and Bay of Bengal in the east and covered by land in the north – China, Nepal, Bhutan etc.

The Tropic of Caner 23 1/2° N latitude passes through the middle of lndia and divides the country into almost two equal halves. Indian Standard Time – 82 1/2° E longitude passes through the middle of India (through Allahabad) is recognized as standard longitude of the country two keep standard time.

Size: India is the 7th largest country in the world next to Russia, Canada, China, USA, Brazil and Australia. It has a total geographical area of 32, 87,263 sq.km. This constitutes about 2.4% of the total land area of the Earth. India is the second most populous country in the world next to China. According to 2011 census the total population of the country was 121.6 crore which accounts for about 17.45% of the total world’s population. India has 28 states, 6 union territories and one national capital region (New Delhi).

Frontiers: India has 15,200km long land frontier extending from west to east running from Gujarat in the west to West Bengal in the east. The Himalayas for a natural boundary in the north, between India and China. Similarly, Thar Desert in the west & northwest and eastern hills acts as boundary between India & Pakistan and India & Myanmar respectively. India share land frontier with seven countries, they are Pakistan and Afghanistan to the northwest, China, Nepal and Bhutan to the north and Bangladesh and Myanmar to the-East.

The important international boundary lines demarcated between India and neighbouring countries are:

The Durand line- India and Afghanistan (80Km) by Mortimer Durand The Me Mahon line- India and China (PRC) (3488Km) by Henry Me Mahon.
The Radcliff line – India and Pakistan (2910km) by Sir Cyril Radcliff.
India and Bangladesh (4097km).
Sri Lanka, an island country, situated to the southeast, is separated by Palk Strait and Gulf of Mannar.

Question 32.
Describe the significance of Northern Plains.
Answer:

• The Northern Plain plays a very significant role in the life of the people and economy of the country.
• The Northern plains have high concentration of population 45% of India’s population.
• They are helpful for agro-based industries and urbanization.
• The northern plains have fertile soil, uniform surface and perennial rivers-suitable for agriculture.
• The plains have encouraged the development of transport and communication.
• The rivers in the plain help in the development of inland water transportation.
• It has rich underground water, useful for irrigation and other activities.
• It has cultural and traditional importance.
• They have great social, religious and political significance.

Question 33.
What is soil? Explain the major types of soils.
Answer:
Soil is the minute or finer rock particles found on the surface of the Earth. It is formed naturally, due to the weathering of rocks, under the influence of climate.

The main types of soil in India are:

1. Alluvial soil: This soil is formed by depositional work of rivers and they are mainly found in the flood plains and deltas. Alluvial soil covers largest geographical are in the country. They are mainly distributed in the river plains of the Ganga, Brahmaputra and the Indus. Uttar Pradesh has the largest area under alluvial soil. It is also found in the deltas of east flowing rivers. Alluvial soils are classified into two types.

• Bhangar: Older alluvium, coarse and pebble like in nature, found at the lower depths of the plain.
• Khadar: New alluvium, finer in nature, found in the low lying flood plains and rich in fertility

2. Black soil: The black soils covered more area in peninsular plateau. This soil is also called ‘Cotton soil’ or “Regur soil”. It is derived from the weathered basalt rocks. This soil holds water from long period and become hard whenever it is dry. It is light-black to dark-black in colour. Maharashtra and Gujarat Madhya Pradesh, Karnataka, Andhra Pradesh and Tamilnadu. Black soils are good for Cotton, Sugarcane, Tobacco, Pulses, Millets, Citrus fruits, etc.

3. Red soil: This soil is formed by the weathered granite rocks. It is red in colour and rich in ferrous content. Red soil covers the second largest area in the country. Largest parts of peninsular region are covered with red soil. TamilNadu has the largest distribution of this soil in the country. Rice, Ragi, Jowar, Groundnut, Tobacco, Millets are the major crops cultivated in this soil.

4. Laterite soil: The hot and humid tropical regions of India are rich in laterite soil. This soil is derived from the fragmentation and disintegration of rocks in the mountain ranges. It is mainly found in the Western Ghats, parts of Eastern Ghats and Northeastern hills of India. Plantation crops like Tea, coffee, Rubber, Cashew nut are cultivated in this soil.

5. Desert soil: This soil is also called arid soil. They are mainly found in the desert and semi-desert regions of Western and North western parts of India. This soil has the least water holding capacity and humus content. Generally it is not suitable for cultivation of crops. This soil is mainly found in Rajasthan, parts of Gujarat and Haryana. With water facility crops like Bajra, Pulses and Guar ar cultivated in this soil.

6. Mountain Soil: The Himalayan mountain valleys and hill slopes are covered with Mountain or Forest soil. It is found in the mountain slopes of Jammu and Kashmir, Himachal Pradesh, Utarkhand regions, Crops like Tea, Almond, saffron are cultivated in this soil.

Question 34.
What are Biosphere reserves? Mention the important biosphere reserves of India.
Answer:
A biosphere Reserve is a unique and representative ecosystem of terrestrial and coastal areas .The regions surrounding the biosphere reserves would be utilized for the research and experimentation in developing forest and other products.

The Man and the Biosphere Programme (MAB) of UNESCO was established in 1971 to promote interdisciplinary approaches to management, research and education in ecosystem conservation and sustainable use of natural resources. Eight of the eighteen biosphere reserves are a part of the world network of Biosphere reserves, based on the UNESCO man and the Biosphere Programme list.

The objectives of Biosphere reserves:

• Conservation of biodiversity and ecosystem.
• Association of environment with development.
• International network for research and monitoring.

Sl.No	Name of the Biosphere reserve	State	Estd.Year
1.	Nilgiri Biosphere Reserve	Tamilnadu, Kerala, Karnataka	2000
2.	Gulf of Mannar Biosphere Reserve	Tamil Nadu	2001
3.	Sunder bans Biosphere Reserve	West Bengal	2001
4.	Nanda Devi Biosphere Reserve	Uttarkhand	2004
5.	Nokrek Biosphere Reserve	Meghalaya	2009
6.	Panchmarhi Biosphere Reserve	Madhya Pradesh	2009
7.	Simlipal Biosphere reserve	Odisha	2008
8.	Achanakmar-Amarkantak	Chhattisgarh, Jharkhand	2012

IV. Answer any one of the following. ( 10 × 1 = 10 )

Question 35.
Briefly explain the distribution of flood prone areas of India.
Answer:
a. The Ganga basin: The badly affected states of the Ganga basin are U.P, Bihar and West Bengal. Besides the Ganga River, Sarada, Gandak and Ghagra cause flood in Eastern part of U.P. The Yamuna is famous for flooding Haryana, U.P and Delhi. Bihar experiences massive and dangerous flood every year by the Kosi. Rivers like the Mahanadi, Bhagirathi and Damodar also cause floods.

b. The Brahmaputra basin: The Brahmaputra along with its tributaries floods the areas of Assam and North West Bengal regions.

c. The Central India and Peninsular river basin: In odisha spilling over of river banks by the Mahanadi, Baitarnika and Brahmani causes havoc. Southern and central India experiences floods caused by the Narmada, Godavari, Tapti and Krishna during heavy rainfall. Cyclonic storms in the deltaic regions of the Godavari, Mahanadi and the Krishna flood the coastal regions of Andhra Pradesh.

On the basis of severity of droughts, India can be divided into three drought prone areas.

a. The Extreme drought prone areas: This is the most important drought prone areas of the country which has been recording continuous drought for many years. The regions are western parts of Rajasthan, Kutch regions of Gujarat and semi-arid regions of Western and North western parts of India.

b. The Severe drought prone areas: This is the second important drought prone areas of the county. The eastern parts of Rajasthan, western parts of Madhya Pradesh, Parts of Maharashtra, interior parts of Andhra Pradesh. North and northeastern parts of Karnataka and Tamil nadu.

c. The Moderate drought prone areas: This region is mainly found in regions of U.P, parts of Gujarat, Maharashtra, Jharkhand, Tamil Nadu and interior parts of Karnataka.

Question 36.
Explain the topography of the Ocean floor with a diagram.
Answer:
On the basis of the depth, the ocean floor can be divided into four zones, parts or relief features. They are.

1. The continental Shelf: The gently sloping portion of the continent or land that lies submerged below other sea is called the continental shelf. The continental shelf has a very gentle slope. It extends form the shore line to depths between 180 and 200 meters. Average width of the continental shelves is about 48km. The extent of the continental shelf depends on the relief of the broadening land masses.

If the coastal area is a plateau area, the continental shelf will be very broad. On the other hand, if the coastal region is hilly or mountainous, the continental shelf will be very narrow or even absent for example the Atlantic Ocean has 2.3%, the Pacific Ocean has 5.7% and the India Ocean has 4.2%.

2. The continental slope: The zone of steep slope that descends from the edge of the continental shelf to the deep sea plains is called “continental slope”. It is the transitional zone lying between the continental shelf and the deep sea plains. The continental slope is very steep. It extends from 182 meters to 3.600 meters. The angle of the continental slope is 2 to 5 degre3es or even more. It occupies only 8.5% of the total area of the ocean floor. But it varies from ocean to ocean. The Atlantic Ocean has broader continental slopes and accounts for 12.4%. But it is 7% of the Pacific Ocean and 6.5% of the Indian Ocean.

3. The deep sea plains: The level and rolling areas of the ocean floor are generally called deep sea plains or abyssal plains or the ocean plains. They lie between 3,000 and 6,000 meters below other surface of the ocean. They occupy vast area of the ocean floor and account for about 82.7% of the total sea floor. They cover about 90% in the Indian Ocean. Their depth ranges from 5,000 to 6,000 meters. They are covered by oozes, which are the remains of deep sea creatures and plants, and of red volcanic dust.

4. The Ocean Deeps: The long narrow and deep troughs on the ocean floor are known as ‘ocean deep’ or ‘trough’. They cover only 1% of the ocean floor. They are most common neat the coasts where young fold mountains, volcanoes and earthquakes abound. Some they are tectonic in origin. They are the deepest portions of the ocean. Deeps may be caused due to tectonic forces, i.e. faulting earthquakes etc. There are 57known deeps. Of these 32 are found in Pacific Ocean, 19in the Atlantic Ocean and 6 in the Indian Ocean. The deepest trench in the world is Challenger deep located in Mariana Trench to the west of Philippines in the North Pacific Ocean.

V. (A) Answer the following in a sentence each. ( 1 × 5 = 5 )

Question 37.
Name any two features of a map?
Answer:
Title, Scale, Direction are essential features of a Map.

Question 38.
Define Index.
Answer:
A map is defined as a symbolical and conventional representation of the earth or a portion f it drawn to scale on a flat surface and bounded by the geographical coordinates as viewed from above.
The features show on a map is indicated by a guide called map index.

Question 39.
What is Weather Map?
Answer:
They show the weather conditions at fixed time. Average atmospheric pressure, wind velocity and direction, cloudiness, rainfall, drizzle; know fall, sea conditions and other weather phenomena are shown on these maps. These maps are published daily by the meteorological department.
i.e. Indian Daily Weather Report.

Question 40.
What is GIS?
Answer:
Geographic Information System (GIS) is a computer system build to capture, store, manipulate, analyze, manage and display all kinds of spatial or geographical data.

Question 41.
Give an example for Large scale map.
Answer:
The distribution maps, where the dot method is applied to show the distribution of economic phenomena e.g. population, agricultural crops, industries etc. Dots of uniform size are used where each dot represents a certain number or quantity.

(B) Identify the latitudes and longitudes for the given places. ( 1 × 5 = 5 )

Question 42.
Bellary

Question 43.
Hubli

Question 44.
Madikeri

Question 45.
Shimoga

Question 46.
Hassan

Answers:
Latitude and Longitude Map of Karnataka

(C) Draw diagrams to the following. ( 2 × 2 = 4 )

Question 47.
Volcanic land forms
Answer:
Various types of landforms are produced by the volcanoes. They can be grouped into

1. Extrusive landforms
2. Intrusive landforms

1. Extrusive landforms: The landforms which have been formed due to the accumulation and solidification of lava and other materials given out by volcanoes are known as extrusive landforms. The important extrusive land forms are:

a. Volcanic cones: volcanic cones are the most typical form of extrusive features or landforms.

The lava and other ejected materials that reach the surface of the earth are accumulated around the crater, and cones are formed. The formation of cones depends jupon the nature of explosion and the materials emitted out of it. There fore, cones are various types. They are:

• Cinder cones: A volcanic cone formed by volcanic cinder accumulated around the crates is called cinder cone.
• Ash cone: A cone shaped hill formed by of volcanic ash that is built up around a volcanic ent is called ash cone.
• Composite cone: A volcanic cone composed of alternative layers of ash, cinder and lava is called composite cone.
• Parasite cone: Some times, many smaller cones are developed in the neighborhood of the main cone. They are called parasite cone.

b. Crater: A crater is pit at the top of volcanic vent, during volcanic eruption, materials form the top of the cone are blown off and a bowl- shaped depression is formed. It is known as crater.
Caldera: Sometime a violent explosion blow away the original cone and forms a large basin-shaped depression called caldera

Volcanic spine: The acid lava, which is vicious, solidifies quickly and blocks the vent. This stands up as a steep-sided cone called spine or plug.

Lava dome: The shape of lava dome is determined by the nature of lava. The highly fluid basic lava builds up shield dome with gently rising slopes, and flattened top. The basic lava, which is highly viscous, builds up dome with a great height and steep slope
Lava plateau: An extensive elevated land made up of depositional lava called lava plateau.

2. Intrusive land forms: Intrusive landforms occur when lava solidifies with the earth’s. crust and gives rise to various shapes or forms. Intrusive landforms are formed along the bedding planes of sedimentary rocks. There are various forms of intrusive landforms. They are:

Dyke: The Magma from the interior of the earth finds its way towards the surface through a passage. When it is able to reach the surface, it cools and solidifies, and a vertical or highly inclined feature is formed, and such a features is called dyke.

Sill: A sheet of magma which lies along the bedding plan is called sill.
Laccolith: Laccolith is a large mound of igneous rock formed along a bedding plane in the sedimentary rock layers.
Batholith: Batholith is a very large dome – shaped intrusion of igneous rock. It is exposed to the surface only after considerable erosion.

Hot springs or thermal spring’s are more common. The water sinks deep inside where the rocks are heated. The heated water rises to the surface without any explosion. Such springs contain dissolved minerals which are of medicinal value. They can be also used to generate electricity. Iceland has thousands of hot springs. A Geyser is a hot spring form which a column of hot water and stream are alternatively ejected to a great height.

Question 48.
Pressure belt
Answer:
Pressure belts of the globe

(D) Draw the outline map of India, mark and name the following

Question 49.
Map drawing (2)
Answer:

Question 50.
Physical divisions of India (2)
Answer:
1. Physical divisions of India

Question 51.
Nilgiri and great Nicobar (2)
Answer:

1. Nanda Devi Saikhawa
2. Nokrek
3. Manas
4. Dibru
5. Dehang Debang
6. Sunderbans
7. Gulf of Mannar
8. Nilgiri
9. Great Nicobar
10. Similipal
11. Khanghendzonga
12. Panchamarhi
13. Agasthymalai
14. Achanakmari – Amar Kantak

Students can Download 1st PUC History Model Question Paper 1 with Answers, Karnataka 1st PUC History Model Question Papers with Answers helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka 1st PUC History Model Question Paper 1 with Answers

Time: 3.15 Hours
Max Marks: 100

Part – A

I. Answer the following questions in one word or a sentence each: (10 × 1 = 10)

Question 1.
Who wrote the book ‘The City of God’?
Answer:
St.Augustine.

Question 2.
Name the ruler who started the construction of the Great Wall of China.
Answer:
Shih Hu Wang Ti.

Question 3.
Who was Gaius Julius Caesar?
Answer:
Great general, dictator, reformer and the symbol of Ancient Rome.

Question 4.
What is Hejira?
Answer:
The secret journey of Prophet Mohammed from Mecca to Medina.

Question 5.
When did the Ottoman Turks capture Constantinople?
Answer:
1453 C.E.

Question 6.
Who was the King ruling over Russia on the eve of Russian Revolution?
Answer:
Tsar Nicholas II.

Question 7.
Which was the last Battle of Napoleon Bonaparte?
Answer:
The battle of Waterloo.

Question 8.
Which treaty ended the World War I?
Answer:
Treaty of Paris in 1919.

Question 9.
Which is the famous book of Hitler?
Answer:
Mein Kampf or My Struggle.

Question 10.
Who used the term Non-Aligned Movement for the first time?
Answer:
V.K. Krishna Menon of India.

Part – B

II. Answer any ten of the following questions in two words or two sentences each: (10 × 2 = 20)

Question 11.
Mention any two theories of ‘Origin of the Earth’.
Answer:
Steady Earth Theory, Pulsating Theory, the Big Bang Theory, etc.,

Question 12.
Write any two factors that helped the growth of civilization.
Answer:
Deposition of fertile soil, supply of water, favourable climate, plenty of food and river valleyshelped the growth of civilization.

Question 13.
Name any two City-States of the ancient Greeks.
Answer:
Athens, Sparta, Corinth and Thebes.

Question 14.
Write any two festivals of the Christians.
Answer:
Christmas, Good Friday, Easter Sunday.

Question 15.
Who were the major intellectual personalities of the Higher Middle Ages?
Answer:
Robert Grosseteste, Roger Bacon, Peter Abelard and St. Thomas Aquinas.

Question 16.
What is Revolution?
Answer:
It is a term derived from Latin ‘revolutio’ which means turnaround. It inconponates fundamental change in governance or organizational structures within a short period.

Question 17.
Name any two British Colonies in America.
Answer:
New Hampshire, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Mary Land, Virginia, North Carolina, South Carolina, Delaware, Pennsylvania and Georgia, (any two).

Question 18.
Which are the two important books of Karl Marx?
Answer:
‘Communist Manifesto’ and ‘Das Capital’.

Question 19.
Who was the architect of unification of Germany? What was his policy?
Answer:
Bismarck-Blood and iron Policy.

Question 20.
Who was Truman? What was the Provision of Truman Doctrine?
Answer:
Harry S-Truman was the president of America at the time of the ending of second world war. This was aimed at US support to the people of the nations who were resisting subjugation by armed minorities and external pressones. By this, he provided Greece and Turkey Economic and military aid to the tune of 400 million dollars.

Question 21.
Expand: CIS. Where is its Headquarters located?
Answer:
Common Wealth of Independent States. It is at Minsk in Belarvs.

Question 22.
Who were called as the ‘Trio’ (Three Stalwarts) of the Non-Aligned Movement Bloc?
Answer:
Josip Broz Tito, Jawaharlal Nehru and Gamal Abdel Nasser.

Part-C

III. Answer any six of the following questions in 15-20 sentences each: (6 × 5 = 30)

Question 23.
Write any five uses of the study of History.
Answer:
History is the memory of the ancient past, teaches religious tolerance, is a source of inspiration, promotes patriotism, a laboratory of social sciences, infuses noble ideals, helps to broaden one’s outlook, has professional uses and removes prejudices.

1. History is the memory of the past events: The study of history gives us information about the biographies of great men and a record of major events of the world. According to Will Durant, “A country’s past is like an individual’s memory. If memory goes, sanity goes with it”. Hayes and Moon wrote “As memory is to man, History is to mankind”.

2. History helps to broaden our outlook: The study of history helps us to get knowledge about the people of different countries, traditions, customs, cultures, and civilizations. Thus it broadens the outlook of mankind. The details recorded in history relating to Art, Architecture, Literature, and Religion expands one’s horizon of knowledge.

3. History promotes international peace: The world has already witnessed the misgivings of the two World Wars, ff another war takes place in the future, it would destroy the whole world. History has pointed out that unawareness of the culture of other countries and narrow nationalism has lead to such wars. Today, there is a great deal of competition among different countries in possessing nuclear weapons and war equipment’s. For the development of cordial relations between nations, the study of world history is the need of the hour.

4. History nurtures and instills nationalistic feelings: (in every nation has a past and ‘ there definitely would have been a golden era under some enlightened ruler in-the part. Knowing about that makes the people of a nation to be proud of their ancestors and spun them on to regain the part glory, (e.g) Mussolini could unite the warring Italian states by highlighting the roman empire and its glory.

5. History has Professional uses: It is a competitive world. History is the main core-subject for the competitive examinations like IAS, IPS, IFS, KAS, etc. Historical knowledge is a matter of necessity for Students, Teachers, Lawyers, Journalists, Administrators, and Statesmen. Thousands of historians are working in the Department of Archaeological survey of India under central and state governments. New job opportunities have opened up for the students of history at Museums, Archives, Tourism development, and related fields.

Question 24.
Explain any two factors of Human Evolution.
Answer:
The study of human evolution is complicated. It involves many disciplines including Anthropology, Primatology, Archaeology, Linguistics, Embryology, and Genetics.

Hominoids lived on tress and were only food gatherers. Hominids adapted to land dwelling. They began to use caves and extended stone boulders as shelters. The shortage of food made them to scavenge for food. They covered long distances to forage or scavenge for naturally dead animals or leftovers of animals killed by predators. The above activities made them gradually develop an upright posture and consequently the bipedal motion. Planned hunting and making tools stimulated the growth in the brain size. The growth in brain size in turn helped them to plan and make better tools.

Domestication of animals was followed by the commencement of agriculture. Humans became food growers. They overcame the effects of the climate changes like the ice age by adapting to domestication of animals and agriculture. Dogs were domesticated first followed by sheep, goat, cow, cat, camel, and horse. The rearing of animals made humans, nomads. Commencement of agriculture is considered as a revolutionary change in the history of human evolution. This was an important aspect of the Neolithic age. Humans began to grow various crops like wheat, rice, millets etc. It made them lead a settled life. This resulted in the formation of human settlements termed villages and later towns which were the foundations of civilizations.

The Hominoids were quadrupeds. The Hominids adapted an upright posture. Hominines further adapted to bipedalism. The skeletal structure and the muscles also adjusted over a period of time to the upright posture and the bipedal motion, which freed-the forelimbs. The forelimbs developed precision grip and power grip and evolved into hands. This greatly helped in hunting and defending from predators as hands could be used to make tools and also use them. Walking on two legs also provided a greater long distance vision and helped them to cover long distances without spending much energy.

The use of tools by humans was another remarkable progress. Wood, bones and stones were used to make tools. They were mainly used for hunting or defending from predators. The making and use of stones tools were responsible to the evolution of forelimbs into hands and also the growth in brain size. In course of time, humans began to,produce metals from ores and make copper, bronze and iron tools which are studied in history as the respective metal ages. The making of stone tools from naturally available stones and using them is positively identified to have begun with Homo habilis. (Any two in 8 to 10 sentences each)

Question 25.
Briefly explain the teachings of Prophet Mohammad.
Answer:
Prophet Mohammad declared “There is no God but Allah and Mohammad is his Prophet”. He criticized the meaningless ceremonials like Idol worship, polytheism and superstitions among Arabs. He preached purity of life, truth and faith in Allah. He preached that Allah would reward the just and punish the wicked. He said “Allah is all merciful, all wise and all powerful”. The new faith that Mohammad preached was called ‘Islam’ which means “Submission to God Allah’. Islam preaches to be truthful, be faithful and to have good conduct. It preaches equality and condemns slavery. Mohammad advocated the following five pillars or Principles of Islam to be followed by all Muslims.

Kalima – It means faith. Every Muslim should profess his faith in Allah and Mohammad.

Namaz – It means prayer. Every Muslim has to pray five times a day. Prayer is the best method to please God and get one’s sins pardoned.

Zaqqat- It means alms giving. Muslims should be honest and sincere. They should give 2.5 % of what they earn in charity. The purpose is to bring economic equality between the rich and the poor.

Roza – It means fasting. Every Muslim should fast in the month of Ramzan, from morning to dusk. Fasting brings purity of heart. It balances the desires, controls one’s habits and creates confidence towards deliverance. It is a proper training to acquire good character.

Hajj – It is the holy pilgrimage to Mecca. True Muslims should undertake Hajj at least once in their life time.

He prohibited gambling, drinking, adultery and use of pork. He preached the democratic principles of equality and universal brotherhood. He also advocated important moral values like respect for women, parents, and kindness to slaves and animals.

Question 26.
Give an account of the causes for the decline of Feudalism.
Answer:
There were several reasons for the decline of feudalism. The major ones are given here under.

1. Rise of strong Monarchies: Europe saw the growth of many strong monarchies, where the Kings suppressed the feudal Lords which led to the decline of feudalism.

2. Shifting of loyalty: Common people and serfs were unhappy as they were heavily taxed and neglected. So, they shifted their faith and loyalty towards their Kings. This weakened the hold of the feudal Lords. So, the system collapsed.

3. Growth of commerce and industry: With the growth in commerce and industry, people found new ways for livelihood and left their lands. The rise of the independent middle class took place, which was a lethal blow to the feudal Lords.

4. Dominance of money Economy: Payment in the form of services was replaced by money. Commoners and serfs stopped giving military services to Lords, which further depleted their power and dominance.

5. Building of strong armies by the Kings: The use of gun powder and well organised armies resulted in the weakening of feudalism. Commoners and serfs under the protection of l Kings felt more secure.

6. Scarcity of labourers: The growth of industries and commerce provided alternate I employment and depleted the labour strength. Spread of epidemics like plague reduced the number of workers. Demand for workers and their increased wages brought down the importance of the feudal Lords.

7. Struggle between the feudal Lords: The feudal Lords were troublesome to the serfs and commoners pd fighting among themselves for control. These infernal wars further decreased their number and the Church also put many restrictions on their functioning.

Question 27.
Write a note on the development of Literature during Renaissance.
Answer:
1. Humanism: The renaissance scholars began to take deep interest in the study of man and his achievements. The humanists promoted rational and humanistic approach, They tried to bring learning into close relation with life. The main idea of this movement was the cultivation of the human personality. Dante, Petrarch, Boccaccio, Cicero, Cervantes and other humanists promoted classical literature. They were called the ‘Morning Stars’.

2. Classicism: A very important feature in Europe during Renaissance was the revival of interest in ancient Greek and Latin classics. This manifested as an expression of classism in Literature along with Art and Architecture. A classical culture developed Europe.

3. Vernacular languages: Renaissance in Europe resulted in the development of vernacular languages like English, German, Spanish and Italian as well. Classical literature in Latin and Greek were translated or written in the vernacular languages. This activity popularised classical literature and developed the vernacular languages also.

4. Renaissance scholars or Rise of new ideas: The teachings of the medieval age were not progressive and the church controlled all the activities of the people. Religious beliefs, political principles, and social standards were all stagnant in this period. The invention of the printing press made it very convenient and easy to spread the new ideas and thoughts to all the nooks and corners of the world. People became enlightened and progressive. The major literary works of this period were the following: Dante’s Divine Comedy. Machiavelli’s The Prince, Sir Thomas More’s Utopia, John Milton’s Paradise Lost, and Paradise Regained, Shakespeare’s numerous Comedies, Tragedies, and Plays, Cervantes’ Don Quixote, etc.,

Question 28.
Explain the results of World War II.
Answer:
The main results of the Second World War were as follows:
1. The Second World War was the most destructive of all the wars fought until then. About 25 million people were killed and 50 million were disabled. Millions of people later died of starvation and diseases. There was a large scale destruction of houses, industries and, communication and transport systems. The destruction of agricultural land led to the shortage of food. After the war, most of the countries faced the problems of post war reconstructions.

2. The World War II ended the dictatorships in Italy and Germany. Italy was declared a Republic under Badogli, and Germany was divided into four zones under U.S.A., U.S.S.R., Britain and France. A Tribunal was set up at Nuremberg to conduct trials of leading Nazis. Japan gave up all its rights on China. Japan was occupied by the Allied Powers.( U.S.A)

3. European domination of the world ended after this war. After the Second World War, U.S.A, and U.S.S.R emerged as two super powers.

4. The distrust between U.S.A and U.S.S.R increased after the war. This led to what is known as the ‘Cold War’. The rivalry of these two super powers had been the most important feature of international relations since 1945. As a result, world peace was constantly threatened.

5. The World War resulted in the victory of the principle of Nationalism and the liquidation of Colonialism. The colonial Empires of European powers in Asia, Africa and Latin America came to an end. India, Ceylon, Indonesia and other countries became independent after the war.

6. The Jews had become homeless during the Nazi regime in Germany. About six million . Jews perished in the concentration camps. After the war, with the help of U.S.A., a new home land (Israel) for the Jews was created in 1948.

7. Japan experienced disastrous effects of atomic weapons. The entire atmosphere became , poisonous. Most of the new born children suffered from serve deformities.

8. The most important result of the World War Second was the birth of United Nations Organization with the object of preventing further wars and maintaining peace in future.

Question 29.
Give an account of the Regional Military Pacts of the Cold War.
Answer:
1. NATO (North Atlantic Treaty Organization): NATO was established in 1949 at Washington. This was a military pact formed by 15 European countries under the leadership of America against Russia. The initial members were America, Britain, France, Belgium, Canada, Portugal, Netherlands, Luxemburg, Italy, Norway, Denmark and Iceland. Later, Federal Republic of Germany, Greece and Turkey also became members. Hungary and Poland joined NATO in 1999. NATO members passed a resolution to help the members if attacked by any foreign power and fight the enemy together. NATO has a contributory military unit and its Headquarters is in Paris.

2. SEATO (The South East Asia Treaty Organization): SEATO was born due to the fear created by the spread of communism. The establishment of communist rule in China further enhanced the fear of the spread of communism in South East Asia and Pacific regions. The United States and Western Powers decided to establish a regional collective defence system.

After many discussions at various places, England, America, France, Australia, New Zealand, Thailand, Philippines and Pakistan met at Manila, the capital of Philippines in 1954 and signed a pact, in the interest of South East Asia.The chief purpose of the SEATO was to forestall the communist aggression. This was put to test in the Vietnam War. After a prolonged war America lost her prestige and consequently the SEATO agreement was dissolved in 1975.

3. ANZUS Pact: It was established in 1951. It was a military pact between Australia, New Zealand and America. By this pact, the signatory nations agreed to help each other in case of aggression on any member in the Pacific region.

4. CENTO or the Baghdad Pact: CENTO was signed in 1955. England took the initiative in organizing this but it did not join initially. It was an Anti Soviet Militaiy Bloc in the Middle East. England joined later along with Pakistan and Iran. In 1958, Karim Kaseem, the President of Iraq flouted the Baghdad Pact, and CENTO failed to contain communist expansion in the Middle East.

5. WARSAW Pact: In 1955, USSR formed the Warsaw pact with the East European countries like Bulgaria, Hungary, East Germany, Czechoslovakia, Rumania and Poland against NATO. This intensified the rivalry between USA and USSR. The Pact came to an end in 1991 with the disintegration of USSR.

Question 30.
Explain the role of India in Non-Aligned Movement.
Answer:
India has played an important role in the formation of Non-Aligned Movement. Jawaharlal Nehru, the Prime Minister of India is called the Architect of Non-Aligned Movement. His ‘Panchasheela’ formed the important principles of Non-Aligned Movement. India has not only coined the word‘Non-Aligned’, but has inspired others about it.

The following facts show the relationship between India and NAM.
1. India has good relations with the other Non-Aligned countries. Nehru’s principles got world recognition in the Bandung conference, which officially declared the Non-Aligned policy.

2. The 7^th summit of Non-Aligned countries was held at Delhi and India’s Prime Minister Smt. Indira Gandhi presided over the conference. She said we should become a united voice in the international organizations. Disarmament, Economic development, technical help were some of the issues that were discussed in this summit. India insisted Israel to withdraw her troops from Palestine.

3. At the 8^th summit of Non-Aligned countries in Harare, the then Indian Prime Minister . Rajeev Gandhi demanded the release of Nelson Mandela of South Africa. He also established the ‘African Fund’ to support the blacks who were fighting for their Rights and Freedom.

4. The summit of Non-Aligned countries was held at Belgrade the capital of Yugoslavia. In this summit, Rajeev Gandhi gave a call for establishing ‘Global Protection Fund’ for the protection of the Environment.

5. At the 12^th and 13^th summits of Non-Aligned countries, Indian Prime Minister Atal Bihari Vajpayee gave a call to take a firm decision to combat international Terrorism. India also supported nuclear disarmament.

6. At the 14^th summit, Indian Prime Minister Manmohan Singh spoke about international terrorism and nuclear disarmament. At the 15^th summit he brought to the notice of Non-Aligned countries, the Mumbai attacks and terrorism. At the 16^th summit held in Iran, Indian Prime Minister Manmohan Singh advocated the need for international action against the spread of nuclear armaments and terrorism. He also gave a call to find a solution to the Syrian problem acceptable to all.

Part -D

IV. Answer the following questions as indicated:

Question 31.
(A) Mark any five of the following Historical Places on the outline map of the world provided to you and add an explanatory note on each marked place in two sentences. (5 + 5 = 10)

1. Rome
2. Jerusalem
3. Cape of Good Hope
4. New York
5. London
6. Berlin
7. Hiroshima
8. Moscow.

Answer:
Rome: Capital of Italy, Capital of Roman Empire. Vatican City-City of Pope.

Jerusalem: In Israel – holy city of Judaism Christianity and Islam. Jesus crucified here.

Cape of Good Hope: In South Africa. Diaz called it Cape of Storms. Renamed as Cape of Good Hope when Vasco da Gama’s hopes of finding a new sea route to India were revived.

New York: In U.S.A. One of the 13 British Colonies. Head Quarters of U.N.O is located here.

London: Capital of U.K. Centre of Industrial Revolution.

Berlin: Capital of Germany, after World War II divided as East & West Berlin. Reunified in 1990.

Hiroshima: In Japan. Atomic Bomb dropped by USA in 1945. 80000 killed.

Moscow: Capital of Russia, one of the centres of Russian Revolution of 1917.

For visually challenged students only.

Question 31.
(B) Answer the following question in 30 to 40 sentences: (1 x 10=10)
Describe the political, social and economic life of the Egyptian Civilization.
Answer:

The early Egyptians settled into villages, which developed into cities and later the City States were formed. They were ruled by Kings. This is known as the pre-dynastic period. These Kings were engaged in inter City – State quarrels. Stronger City – States showed their supremacy and started taking over other weaker City – States. This made way to the birth of Kingdoms. Different dynasties ruled these Kingdoms. About 30 dynasties have ruled Egypt for more than 3000 years. No dynasty survived for more then 6-7 generations.

The Egyptian Kings were called ‘Pharaohs’. They were considered as representatives of God on earth, hence enjoyed unlimited power. The Pharaoh ‘Menes’, united south and north Egypt in around 3000 B.C.E and made Memphis as his capital. The strong central government with absolute monarchy, a well controlled administration and strict implementation of laws were the basic features of Egyptian polity.
The rule of dynasties can be divided into 3 phases.

1. The Period of Old Kingdom.
2. The Period of Middle Kingdom.
3. The Period of New Kingdom.

The Period of Old Kingdom: It is also known as the Period of Pyramids. The Pharaohs of this period were very strong. There was a council of elders to advise the King, whose advice was not binding on the King. Pharaohs appointed Vizir, the Prime Minister who headed the Administration, Justice and Treasury. The Local officers maintained the records and the accounts.

The Period of Middle Kingdom: It is also known as the period of Feudal Lords. During this period, Lords became more powerful than the Pharaohs. It led to many internal wars and anarchy. The authority of Pharaohs was restored by Amen Hotep I.

The Period of New Kingdom: During the new Kingdom, the Kings raised a powerful army and built a very strong Empire. Thutmose I conquered new territories and expanded the Empire. His daughter, Hatshepsut succeeded him. She was the first Empress in the history of the world. She ruled for twenty one years.

Egyptians developed pictographic writing. It is one of the earliest forms of writing. Egyptian writing is called Hieroglyphics. Glyph means a sign. Hieroglyphics contains hundreds of signs. Some of them stand for complete words while others represent sounds. Papyrus was used for writing. ‘The Books of Dead’, ‘Coffin Text’, ‘The Story of Ship wrecked Sailor’, ‘The tales of Anupu and Bitiu’, etc., were the important books of that era.

Egyptians had a fair knowledge of Medicine, Geometry, Calendars, Astronomy and Mathematics. Most of the scholars of ancient Egypt belonged to the priestly class. The construction of huge pyramids proves beyond doubt that Egyptians had sound knowledge of Geometry and Arithmetic. They were the first to develop the fraction system. They made a clear distinction between stars and planets. Their calendar was based on sun and known as solar calendar. They developed the calendar of 3 65 days with 12 months in a year and 30 days in a month. They divided the year into three seasons of four months each. About 1500 B.C.E, they invented the Shadow Clock to mark the times of a day. A specimen of such an Egyptian shadow clock is preserved in the Berlin Museum.

Egyptians were great builders. They developed fine arts. Their arts and architecture reflected their culture. They built temples for their Gods and Pyramids to bury their Kings. These are the proofs of a well organized and highly skilled artists, craftsmen and labourers. The Sphinx has the head of a man and body of a lion. Emperor Khaphre got it carved. It is 240 feet long and 66 feet high, carved out of a single stone.

The pyramid of Giza is the tomb of King Khufu. It is one of heaviest structures ever built. It was built by his son and grandson. It is the biggest pyramid, 746 x 746 and 481 ft high 23,00,000 stone blocks of average 2.5 ton weight were used in its construction. It occupies 13 acres of area. A million slaves worked for 20 years to complete it. It had a magnificent entrance. The road in front of it was lined with 365 statues of Sphinxes and two tall Obelisks stood on either side of the main road. During festive seasons the statues of Gods were paraded through the doors into the temple. There are more than 90 smaller Pyramids, still standing after 4000 years of their construction. The Pyramids are fine examples of the outstanding technical knowledge and sound administrative ability of the ancient Egyptians.

( OR )

Write a note on the role played by Mazzini, Cavour and Garibaldi in the unification of . Italy.
Answer:

The third stage of Italian Unification was achieved by the great patriot, Garibaldi. He was born in 1807 at Nice. He became a member of ‘Young Italy’ at the age of 24 and took part in the revolutionary activities.

He participated in a revolt organized by Mazzini at Savoy in 1834. But the revolt failed. Because of his nationalistic activities he was given death sentence. He managed to escape to – South America and lived in exile for 14 years. He had a large number of loyal followers prepared for any sacrifice for the sake of their country. They were transformed into an army called ‘Red Shirts’. During the 1848 revolution, he returned to Italy and took part in Italian Nationalist Movement. During the war between Sardinia and Austria, he commanded the Sardinian forces.

In 1860, the people of Sicily sought his help against the Bourbons. Immediately he went with his army of Red Shirts and within two months Francis II was defeated and Sicily was annexed. Then he went to Naples and defeated Francis II there also. He wanted to proceed to Rome, but Cavour did not like his move and prevailed upon Victor Emmanuel II to prevent him from doing so. So an army of Victor Emmanuel II was sent to Rome. Garibaldi, whose main aim was the Unification of Italy, handed over Naples and Sicily to Victor Emmanuel II. Garibaldi is called the ‘Sword of Italian Unification’. A true patriot, he refused to accept titles and honours which were offered to him, went back to his village and lived the life of a peasant. Victor Emmanuel II, the King of Sardinia was a patriot himself and an honest King of Italy.

He achieved the unification through peaceful negotiations. He appointed Count Cavour as his prime minister. By 1861, Cavour had united-most of Italy. On 18^th February 1861, a new Parliament was convened at Turin and Victor Emmanuel II was proclaimed as the King of Italy. But Venetia and Rome were yet to be added. Venetia was under Austria and Rome was under the Pope. In 1866, a war broke out between Austria and Prussia, in which Victor Emmanuel II sided with Prussia. The victory of Prussia over Austria compelled Austria to give Venetia to Italy.

In 1870, when there was a war between Prussia and France. Napoleon III withdraw his forces from Rome which had been kept for the protection of the Pope. Immediately, Victor Emmanuel’s troops occupied Rome. The unification of Italy was completed in 1870. Rome became the capital of United Italy. Thus, the Patriotism of Mazzini, the Wars of Garibaldi, the Diplomacy of Cavour and the Statesmanship of Victor Emmanuel helped the Unification of Italy.

Part – E

V. Answer any two of the following questions in 30-40 sentences each: (2 × 10 = 20)

Question 32.
Explain the contributions of the Greeks in the fields of Literature, Science and Philosophy.
Answer:
In the field of literature, Greeks contributed to Epics, Poetry, Drama and History. ‘Iliad’ and ‘Odyssey’ are the two famous works of Homer. These Epics give us a fairly faithful account of the social, economic and political conditions of early Greek Culture. The shorter Greek poems were called Lyrics. Pindar and Sappo were the two lyric poets of Greek Civilization.

The drama is the most familiar of the Greek forms of literature. The remains of Greek theatres can be still be seen all over the Aegean region. The founder of Greek tragedy was Aeschylus, author of ‘Prometheus Bound’ and ‘Agamemnon’. Sophocles, the greatest of the Greek, tragedians, wrote ‘Oedipus Rex’, ‘Antigone’ and ‘Electra’. These plays are admired all over the world even today. Euripides the third of the great tragic Poets believed that, in life people were more important than Gods.

Hence he concerned himself with the passions and emotions of human beings. One of his best known plays is the ‘Trojan Women’. Aristophanes was the greatest comic poet! World’s first great historian Herodotus, Thucydides who wrote he ‘Peloponnesian Wars’ and Plutarch known for his biographies- ‘Lives of illustrious men’ all lived during this period. Oratory is the art of making public speeches. The most famous orator of that period was Demosthenes.

Greek philosophers furnished the impetus for the beginning of the study of science. Aristotle laid the foundation for the study of natural science. Theophrastus, established Botany as a recognized science. Hippocrates known as the ‘Father of Medicine’ laid the foundations of modern medicine. He taught that diseases have a natural origin and not caused by evil spirits. Herophilus is called as the ‘Father of Anatomy’.

Ptolemy believed that the Earth was the center of the Universe. But Aristarchus propounded the theory that Earth and other Planets, revolved around the Sun. Eratosthenes calculated the approximate circumference of earth within a small error of 320 Kilometers. He also prepared a fairly accurate map of the world and he was the first to suggest that one could reach India from Europe by sailing westwards. Pythagoras and Euclid made many contributions to mathematics, especially to Geometry. Archimedes was also a famous scientist of ancient Greece.

The word Philosophy is derived from the Greek word ‘Philosophia’ which means “Love of Wisdom”. The Sophists believed that there was no absolute truth but looked at every so called truth in relation to its effect on human beings. They taught the techniques of effective speaking, writing, oratory, rhetoric etc. The most famous Philosophers were Socrates, his disciple Plato and Plato’s student Aristotle. Aristotle was the teacher of Alexander the great.

He was both a Philosopher and a Scientist and wrote on many subjects. He is regarded as the father of three branches of knowledge, namely Philosophy, Biology and Political Science. He said that ‘Man is a social animal’. He encouraged constitutional Governments. He classified and organized the different branches of knowledge-segregating Physics, Metaphysics, Logic and Ethics. His important works were ‘The Politics’ and ‘History of Animals’. That is why he is considered as the ‘Walking University’.

Question 33.
Describe the role of Martin Luther in the Reformation Movement.
Answer:
Reformation began in Germany and its leader Martin Luther was born at Eiselben in 1483 A.D in a poor German peasant family. Luther studied theology, law and humanism at the University of Erfurt in 1508 A.D. He was always haunted with the question, “how to please God?” Lie . seriously studied the Bible and the works of St. Paul and St. Augustine. He became a Professor of Theology in the University of Wittenberg. Luther strongly believed that man could get salvation only through God’s mercy but the Church preached that it possessed the means of salvation. He rejected the doctrine of good work.

He visited Rome in 1511 A.D and was shocked at the worldliness of the Pope and the corrupt and immoral life led by the clergy. He did not to tolerate the corrupt practices of the Church. In 1517, Pope Leo-X sent out several agents to dispense indulgences in order to collect funds to complete St. Peter’s Basilica in Rome. They spread the belief that indulgences were passports to heaven. One of these agents, John Tetzel was selling indulgences as passports to Heaven.

Luther’s opposition: Luther wrote his objection against the Church practices and Pope’s authority in Latin. He prepared his objections in the form of ‘95 Theses’ and posted them on the door of the Church in Wittenberg, Thereupon Luther started a rebellious Movement against the abuses of the Church. This popular revolt came to be known as Protestant Movement.

Luther questioned the authority of Pope and challenged the concept of infallibility. As a result of these activities, the Pope ordered Emperor Charles-V to take action against Luther. In 1521 Charles-V summoned the Diet of Worms and ordered Luther to appear before the Diet to justify the charges made against the Pope. In the Diet of Worms, Luther was excommunicated by the Pope. He was expelled from the Church and was branded a heretic.

Question 34.
Briefly write about the causes and result of the French Revolution of 1789.
Answer:
The various causes for the outbreak of French Revolution of 1789 are as follows.
Social Causes: Social inequality was one of the main causes for French revolution. The first two Estates monopolized all the highest offices in the Army, Church and the Government. They were also exempted from paying taxes and free from the authority of the court. They were the owners of enormous wealth and exploited the peasants and workers. On the other hand, the conditions of the commoners were deplorable. They had to pay all taxes and were not eligible for any higher government services. “The Nobles fight, the Clergy pray and the Commons pay”, was a popular statement in France. Thus the majority of the French people were disgusted owing to their social inferiority and discrimination, which paved the way for the outbreak of this revolution.

Economic Causes: The policy of taxation in France was defective and unfair. The burden of tax mostly fell on the Commoners, because the Clergy and Nobles were exempted from all kind of taxes. Commoners had to pay ‘Taille’ (Property Tax), ‘Gable’ (Salt Tax), ‘Tithe’ (Religious Tax) and other cesses to the Government. This kind of economic exploitation and discontent among the common people made them to revolt against the discriminative taxation policy of the French Government.

Intellectual Causes: Many great Philosophers during.18^th century in France, criticized about the political tyranny, social inequality and economic exploitation in France and also insisted for reforms. France was prepared mentally and morally for a revolt against the old regime because of the writings and speeches of these brilliant thinkers of that age. They strongly criticized the Church and social inequality and provided the intellectual justification for the revolution.

Montesquieu advocated the ‘Theory of Separation of Powers’ as per which, Legislative, Executive and Judiciary should function independently to safeguard the liberty of the people. Voltaire asked people to apply ‘Reason’ in every field. Rousseau gave the watch word of the revolution ‘Liberty, Equality and Fraternity’. Diderot condemned the privileged classes.

Political causes: The ‘Bourbon Dynasty’ which ruled France for many centuries neglected the interests of the people and ruled according to their whims and fancies. During Louis XV’s reign, France fought many wars viz., the War of Austrian Succession, the Seven Years War and others. In these wars it was defeated and it was a great financial burden. The administrative system of France was highly flawed and the Rulers neglected their responsibilities and welfare of the people and were addicted to women, wine and wealth. The officials were highly corrupt and there was no uniform legal system. This type of political anarchy, absolutism and misrule increased the dissatisfaction of the people and led to the revolution.

Immediate cause: The financial condition of France was deplorable by about 1789. National debt increased owing to the costly wars and lavish life style of the King and his family. Unprivileged class was paying all the taxes. The Finance Ministers of France suggested the reduction in unnecessary expenditures and to impose some taxes on the privileged classes to solve the financial crisis which was not acceptable to the privileged classes and the deterioration continued.

The results of the French Revolution are:

1. This revolution abolished absolute monarchy and ended the political anarchy and misrule of the French Kings. It paved way for the establishment of a Republican Government in France based on the democratic principles, as propounded by Montesquieu, J.J. Rousseau and others.

2. The French Revolution ended Feudalism and hereditary aristocracy. It proved that suppressed ones can revolt against the oppressive government.

3. It put an end to the special privileges of the Clergy and Nobility and their properties were confiscated. Thus social inequality also ended.

4. The new constitution declared the rights of man, which upheld the ‘Doctrine of popular sovereignty’.

5. This revolution popularized the ideas of Liberty, Equality and Fraternity in other countries of the world.

6. It spread the feeling of unity and taught the principles of Nationalism among the French people. Hence, it became a source of inspiration to the Unification of Italy and Germany and finally freedom movements in other parts of the world including India. H.A.L Fisher says “If cold attacks France, the entire Europe sneezes”.

7. This revolution caused heavy bloodshed. During ‘The Reign of Terror’, nearly 17000 people were killed. Even King Louis XVI, his Queen Marie Antoinette and others were Guillotined.

8. The Directory Government, which came.to power after the revolution, failed to rule properly, Again there was chaos and confusion in France. This gave an opportunity for the rise of Napoleon Bonaparte as the military Dictator of France. He called himself as the ‘Child of Revolution’.

Thus the French Revolution was indeed a’great event in the history of France. The political developments after this revolution greatly changed the course of the History of Europe and also the world.

Question 35.
Describe the achievements of UNO.
Answer:
Achievements of U.N.O are manifold:
The U.N.O. has carried out several successful programs and operations. The achievements of the U.N.O may be grouped under two headings, namely, political and non-political.

Political: In the political field, the UNO has notable achievements. The foremost achievement of the U.N.O is that there has not been a global war and the use of nuclear weapons since
1945.

The first issue that was solved by the U.N.O was the case of Iran. Russian Troops were stationed on the Northern borders of Iran during the Second World War. After the war, Iran complained to the U.N.O. So, U.N.O intervened and made the Russian Troops to withdraw from Iran in 1946.

1. In 1947, a quarrel started in Indonesia between Holland and Indonesia. It was settled by the U.N. in 1948.

2. In September 1948, France, England and U.S.A. complained to the Security Council about the blockade of Berlin by the U.S.S.R. Later, an agreement was reached due to the efforts of U.N.O.

3. U.N.O. was able to stop the fighting between the Israeli Jews and Arabs in Palestine in 1948.

4. The U.N.O ordered cease-fire in Kashmir in 1948.

5. In the Korean crisis when war broke out between North and South Korea, the U.N.O used armed forces to settle the dispute.

6. The Suez Canal and Vietnam problems were solved with the mediation of the U.N.O.

7. It also put an end to the fighting between Iraq and Iran in 1989.

8. Iraq occupied Kuwait in 1990. Immediately, Kuwait approached U.N.O for help. So, the U.N. made Iraq vacate Kuwait in 1991.

9. It has worked to maintain peace in several countries of the world. It has carried out peace . keeping missions in Greece, Lebanon, Cyprus, Congo, Cambodia, Korea, Kosovo, etc.,

10. South Africa was following the Apartheid policy.U.N.O. setup a special committee and imposed sanctions against South Africa in 1954. Ultimately the Apartheid regime came to an end in 1991.

Non-political: A notable achievement of the U.N.O was the adoption of the Universal Declaration of Human Rights in the General Assembly on lOth December 1948. The Declaration included articles like the right to life, liberty and security of person, freedom from slavery, freedom of thought, the right to vote, to work, etc.

1. U.N.O has done excellent work through its specialized agencies. The ILO has made the member nations to improve the conditions of the labourers.

2. FAO has assisted the nations to increase the food production in farms, forests, fisheries and increase nutrition levels. It has also helped to feed millions of hungry children in the third world countries.

3. IMF and IBRD are giving funds for the economic development of different backward countries.

4. UNESCO has done much work in many backward countries in the social, educational, economic, technological and other fields U.N.O. helped the refugees of war, earthquake, tsunami etc. It had arranged for food, shelter and rehabilitation of war victims throughout the world. The U.N.O has helped preserve many cultural sites throughout the world as World Heritage Sites like Hampi, Pattadakal, Konark etc.

Part – F

VI. 36. Match the following: ( 05 )

Answers:

37. Arrange the following events in Chronological Order. ( 05 )

1. Treaty of Versailles
2. Bandung Conference
3. Construction of Parthenon temple
4. Unification of Germany
5. Invention of Printing Press

Answer:
1. Construction of Parthenon temple
2. Invention of Printing Press
3. Unification of Germany
4. Treaty of Versailles
5. Bandung Conference.

Students can Download 1st PUC Geography Previous Year Question Paper March 2014 (North), Karnataka 1st PUC Geography Model Question Papers with Answers helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka 1st PUC Geography Previous Year Question Paper March 2014 (North)

Time: 3 Hrs 15 Min
Max. Marks: 100

Instructions:

1. Answer All the questions.
2. Draw map and diagrams wherever necessary.
3. Question No. V is on cartography
4. Blind students attempt only VA, 52, 53 and 54 instead of V – B, C and D.

I. Answer the following questions in a word, or a sentence each: (10 × 1 = 10)

Question 1.
Who is the father of Geography?
Answer:
Eratosthenes.

Question 2.
What is the approximate age of the Earth?
Answer:
4.6, Billion Years.

Question 3.
What is geomorphic process?
Answer:
The process carried out by Endogenic and Exogenic forces are called as geomorphic process.

Question 4.
What is weathering?
Answer:
Process of disintegration and decomposition of rocks is known as weathering.

Question 5.
What is denudation?
Answer:
The wearing away of the surface of the earth by natural agents is known as denudation.

Question 6.
Which is the lowest layer of the atmosphere?
Answer:
Troposphere.

Question 7.
What is Nautical mile?
Answer:
The length, width and areas of oceans is measured by means of nautical miles.

Question 8.
What is Isohalines?
Answer:
These are the imaginary lines drawn on the map to show the places having the same amount of salinity.

Question 9.
What are Biomes?
Answer:
A district group of life forms and the environment in which they are found is called Biomes.

Question 10.
Name strait which separate India and Srilanka
Answer:
Palk Strait.

II. Answer any ten of the following in two or three sentence each : (10 × 2 = 20)

Question 11.
Write the composition of Nife.
Answer:
The inner Core of the barrysphere is called ‘Nife’ as it consists of Nickel and Ferrous (Iron)

Question 12.
Name any two types of weathering.
Answer:
Physical weathering and chemical weathering are the major types of weathering

Question 3.
What is Ionosphere?
Answer:
The thin layer extends from the ozonosphere form an altitude of about 80 to 640 km above the earth surface

Question 14.
Mention the four atmospheric pressure belts.
Answer:
The distribution of pressure is not equal on the earth’s surface. It changes from palace to place and time to time on the basis of air temperature and rotation of the earth. Any area in the atmosphere where air pressure is higher than in the surrounding areas is called “ High pressure”/ Thee are 4 high pressure belts and 3 low pressure belts on the earth’s surface.

Equatorial Low pressure belt: This belt lies between latitudes 5° N and 5° S. The Sun’s rays are almost vertical on the equator throughout the year. As a result, the temperature is uniformly high and pressure is low throughout the year. It is also known as “Doldrums”. The air gets warm and rises upward. Horizontal movement of air is absent and convectional currents occur. This is the zone of convergence of the trade winds.

Sub tropical high pressure belts: The air ascended in the form of convectional currents from the equatorial region partly descends in the between 30 to 40’ latitudes in both the hemispheres. The descending air has thus formed two high pressure zones known as subtropics high pressure belts. It is the zone from which trade and anti-trade winds originate. This belt is also known as “ horse altitudes’. It is dry and quite stable. The name horse latitude is given by the ancient sailors who used to transport horses on ships. Due to absence of strong winds, some times the ship could not move with horses. Hence sailors used to dump horses to make the ship move forward.

Sub Polar low pressure belts: In between polar high pressure knd sub-tropical high pressure belt, the sum-tropical low pressure belts are situated. They lies in between 60’ to 70’ latitudes in both the hemispheres. They are formed with spinning action of rotation of the earth and also uprising air as an effect of incoming cold polar winds.

Polar high pressure belts: The Polar Regions are characterized with low temperature. The air raised at the equator descends around the poles causing high pressure belts. The cold polar winds blow outward from this zone.

Question 15.
How is Mountain Rainfall caused?
Answer:
During this rain the moisture laden winds are forced to ascend over the mountains in their path. As the wind rises, it expands and looses temperature. This results in condensation, leading to rainfall. This rainfall is found in the windward side of the mountain and is heavy.

Question 16.
What are the factors influences on ocean temperature?
Answer:
Salinity of ocean water refers to the amount of dissolved solids in the ocean water. Ocean water consists of various kinds of chemical elements and minerals. Of these constituents, sodium chloride is the most important constituent of ocean water. The other constituents or salts like magnesium chloride, magnesium sulphate, calcium sulphate, potassium sulphate, etc. Are also present in the ocean or sea water.

The ocean water is saline by the rivers which bring huge amount of mineral salt dissolved in water. Another reason for salinity is the evaporation of sea water, by which mineral salt in the sea or ocean water increase every year Salinity is measured in gram per kg of sea water and it is expressed as part per thousands for examples: 35% it means 35gram of salt in 1000 gram of sea water.

Factors affecting the salinity in the ocean water are: Evaporation, Precipitation, and Fresh water mixing with ocean water, ground water and glaciers increase the percentage of salt content in the ocean. The trade winds drive away saline water to less saline areas resulting the variation of salt content.

Latitudes, precipitation, mixing of fresh water etc. influence on the horizontal and vertical distribution of salinity. The regions near Tropic of Cancer and Capricorn record high salinity due to high temperature, more evaporation, low rainfall and cxtensive arid and semi-arid areas. While the equatorial region record low sanity because of high temperature and high rainfall.
The polar region record least salinity due to very low temperature, evaporation and less rainfall.

Question 17.
What is a spring tide?
Answer:
The tides which occur when the earth, sun and moon are more or less in a straight line

Question 18.
Write the latitudinal and longitudinal extent of India.
Answer:
India extends between 8°4’ N to 37°6’ N Latitude and 68° 7’ E to 97°23 E longitude.

Question 19.
How India is a peninsular country?
Answer:
India is a peninsular country because it has water bodies on its three sides. The Indian ocean lies in the south, Arabian sea lies in the west and Bay of Bengal lies in the east.

Question 20.
Mention any two hill stations of the Himalayas.
Answer:
The important hills stations are Shimla, Mussorie, Raniket, Nainital, Almora, Chakrata, Darjeling etc.

Question 21.
Mention any four factors that cause floods.
Answer:
Floods are caused by both natural and man-made factors. They are:
(a) Natural factors

• Continuous rainfall for a long period
• Cyclones
• Obstruction on flow of river water.

(b) Man made factors:

• Deforestation
• Unscientific Agricultural practice
• Urbanizatio

Question 22.
Mention the important regions of land slides in India.
Answer:
They are three important region.

1. Himalayan Zone
2. Western Ghats
3. Southern plateau

III. Answer any eight of the following questions in 25 to 30 sentences each. (8 × 5 = 40)

Question 23.
Explain the branches of Geography.
Answer:
1. Physical Geography.
The field of physical geography is wide as it includes the study of the entire surface of the earth and also its physical and biological process as well as their morphology. Modern geography has witnessed the development of many branches and some of them even grown into separate disciplines.

Some of the important branches of physical geography are as follows:

• Geomorphology: It is a systematic study of landforms, such as mountains, plateaus, plains, valleys, etc.
• Climatology: Climatology encompasses the study of structure of atmosphere and elements of climates and climatic types and regions.
• Meteorology: The scientific study of atmosphere condition is called meteorology.
• Pedology: It is the scientific study of soil formation, structure, texture, chemical composition and their influence on plant growth.
• Hydrology: Hydrology studies the realm of water over the surface of the earth including oceans, lakes, rivers and other water bodies and its effect on different life.
• Seismology: It is the study of Earthquakes, their effects and distribution.
• Astronomical Geography: It is the study of heavenly bodies of the space like planets, satellites, stars etc in relation to the earth.
• Volcanology: It is the scientific study of tectonic process of volcanoes.
• Astronomical geography: It is the study of heavenly bodies of the space like planets, satellites, stars etc in relation to the earth.
• Bio-geography: It is the systematic study of the distribution of plants and animals.
• Hydrology: The study of water on the earth’s land is known as hydrology.
• Oceanography: The study of waves, tides and currents and the other characteristics of oceans, known as oceanography.

2. Human geography: It deals with man and his activities particularly cultural environment factors on man made factors, Important among them are culture, Society, agriculture, mining, industry, transport forming trade population etc.
Some of the important grander of Human geography are as fallows:

1. Political geography: It deals with spatial unit, people distribution, political behavior, political divisions etc.

2. Economic geography: It refers to basic attributes of the economy such as production, distribution exchange of goods and consumption. It deals with the spatial aspects of production, distribution and consumption and also helps on understanding the most proper location for establishing different human activities.

3. Commercial Geography: It deals with the spatial distribution of trade and commercial practices etc.

4. Population Geography: It helps to understand the distribution, growth density, migration and various other components of population.

Question 24.
Describe proofs regarding the spherical shape of the Earth.
Answer:
There are several proofs to regard the earth as a spherical shape of the Earth.
a. Heavenly bodies appear to be spherical: The Sun, the Moon and other heavenly bodies appear to be spherical when viewed from different position. The earth is one of them and hence it must also be spherical in shape.

b. The Lunar Eclipse: The lunar eclipse proves that the Earth is in spherical shape. During lunar eclipse when the Earth is between the Sun and the Moon, the shadow of the Earth falls on the Moon. Aristotle was the first scholar to show this by looking at the shadow of the Earth on the lunar surface. Later, this was ascertained by Ptolemy. This is considered to be the oldest proof in respect of the shape of the Earth.

c. Sunrise and Sunset: The time of Sunrise and Sunset is not the same everywhere in the world. This is due to spherical shape of the Earth. If the Earth were to be flat all places on the Earth would have had sunrise and sunset at the same time everywhere in the world.

d. Circumnavigation: Circumnavigation of the world can only be possible when the Earth is in spherical shape. If one start on a sea voyage towards the east, by moving constantly in the same direction, he would be able to complete a circle of the world and reach the original point form where he had started.

e. The Bed Ford level experiment: Dr.Alfred Russel Wallace conducted an experiment in 1956, along the Bed Ford level canal area in Britain. It is the most convincing proof of the curvature of the Earth. He fixed three poles of same height at an interval of about mile apart and observed through a telescope. It was found that the pole in the middle was higher than other two poles. It is due to the curvature of the Earth. If the Earth were to be flat all the poles would have the same horizontal level.

f. Sighting a ship: A ship on the sea approaching the coast, when seen from the short does not come into view all at once. The observer first sees the mast and then the hull and finally the whole ship. A ship moving away from the coast disappears gradually and finally out of view. If the Earth were to be flat the whole ship would have come into view.

g. Aerial and Satellite Photographs: The photographs taken by the cosmonauts in the recent decades and satellites have provided ample proof to show that the earth is spherical in shape.

Question 25.
Describe the factors affecting physical weathering.
Answer:
The disintegration of rocks without any chemical change in their compost in is known as mechanical or physical weathering. The disintegration of rocks occurs mainly due to the influence of temperature variation, frost action, wind action, rainwater, etc.

A. Surface are heated and expand. During the nights the rock surfaces are cooled due to , fall in temperature, rocks contact. The repetition of exemptions and contraction causes tension and stress which leads to cracks in the rocks. Then the rocks disintegrate into i blocks. This process is known as Block disintegration, Rocks are made of different types of minerals.

So the different parts of the same rock mass react differently to temperature. This leads to differential expansion and contraction inside the rocks. The rocks break up into smaller grains. This process of weathering is, called “Granular disintegration”. Due to variat Temperature in the upper and lower layers, the outer layers of rocks peel out into the uric shells. This process of weathering is known as “Exfoliation”.

B. Frost: Rocks are disintegrated due to freezing and thawing of water in the cracks or joints in the rocks. This frost action is more important in the temperate and cold regions. The water present in the cracks of rocks freezes during the night due to fall in temperature below freezing point. When water freezes it expands by 1/10 its volume. It thaws (melts) during the day, due to increase of temperature and it contracts in volume. This alternative freezing and melting of water widens other cracks in the rocks, splits and breaks then into blocks. This is known as frost shattering.

C. Rain: Sometimes, when rain falls suddenly on highly heated rocks in hot desert numerous cracks are developed. This is just like a heated chimney of a lamp, when a drop of water falls on it. The repetition of this mechanism causes disintegration of rocks. In humid region, when torrential rain occurs, the drops strike the rock surface and loosen the particles.

D. Wind: In the deserts the wind blows with greater speed carrying with it sand and rock materials, they collide with each other or strike against the loose rock and cause weathering. In deserts the wind cause this type of weathering on a large scale.

E. Sea waves: Sea waves strike the costal rocks. Repeated striking enlarges the incipient joints. Fractures and cause breaking of rocks into small blocks. Weathering also takes place due to hydraulic pressure, abrasion and attrition caused.

F. Slope: A steep slope helps in weathering. In mountainous and hilly area, sometimes, on account of gravity, blocks of rocks move down the slope while rolling down the slope, they strike against other block and break up into pieces.

G Gravitation: the gravity of Earth makes the huge rocks to roll towards the slope. Rolling rocks strike against each other and break up into pieces.

Question 26.
What is a land form? Explain the different types of geomorphic processes.
Answer:
A land form is any natural formation of rock and dirt, found on the earth. A landform can be as. large as a mountain range or as small as a hill. Landforms are natural features of the landscape, natural physical features of the earth’s surface eg. Valleys, plateaus, Mountains, plains, hills loess plains. The minor landforms include hills, ridges, valleys, basin etc. According to Geo-scientist the landforms are formed by the forces acting from the interior and on the surface of the Earth.

The processes carried out by Endogenic and Exogenic forces are called geomorphic processes. Endogenic forces: The internal forces are also known as endogenic forces. These are mainly the land building forces. Diastrophism includes all these processes; that move, elevate or build portions of the earth’s crust.

The internal forces are also known as endogenic forces. Exogenic Forces: The external forces are also known as Exogenic forces. These forces are found on the surface of the Earth, Which bring changes through degradation and aggradations process. River, glacier, wind, sea waves are the major sources of external forces.

Question 27.
Briefly explain Bio-weathering.
Answer:
The disintegration of rocks caused by plants, animals and human beings is called “Biological Weathering”.
(a) Plants: The roots of the plant grow through soil and in the cracks of rocks to find water and minerals. As the roots grow deep in the rock they widen and disintegrate the rocks. This process is most prominent in thick forests and vegetative regions.

(b) Animals: The burrowing animals like rats, rabbits, ants, earthworms and termites influence in the breaking up of rocks and make passages below the ground. The seepage of air and water through these passage results in rapid weathering of rocks.

(c) Human beings: Human beings play an important role weathering of rocks, through activities like agriculture, mining quarrying, oil drilling, deforestation etc.

Question 28.
Explain the structure of the Atmosphere.
Answer:
The distribution of temperature is not uniform at different height of the atmosphere. Along with the variation of temperature there are unique features at different heights. Based on these characteristics atmosphere is divided into four parallel zones.

1. Troposphere: It is the lowest layer of the atmosphere and les closer to the earth. The word ‘Tropos’ means ‘turn’ It extends up to 18km at the equator and 8km at poles. Thus the average height is about 10-12km. The important feature of the troposphere are:

Hydrological cycle: It is confined to troposphere. The water evaporates and raised up, formation of clouds takes place. Later it is precipitated in various forms like rain, snow and hailstone. These processes are known as evaporation, condensation and precipitation.

Lapse rate: In this layer the temperature decreases at the rate of 6,5’ Celsius per every 1000 meters of height which is known as ‘lapse rate’.

Clouds: It is characterized with formation of clouds, thunder storms and lighting.
Gaseous Mass: The troposphere has about 75 percent of the total gaseous mass, The upper part of troposphere is known ‘Tropopause’.

2. Stratosphere: It lies above the tropo-sphere and extends up to 50km from the earth. The temperature is also most unifonnly distributed. Hence it also known as isothermal zone. At a height of 22kms. There is a thin layer of ozone which absorbs ultraviolet rays of the sun. So it is called as ozonosphere. The name staratopause is given to the upper part of the stratosphere.

3. Mesosphere: It extends from 50 to 80kms. It is an intermediary zone between the lower and upper layers of the atmosphere. A thin layer of air separating mesosphere from the other upper layers in named as‘Mesopause’.

4. Ionosphere: It extends from 90 to 500km. It consists of atoms of air ionized due to intensive temperature. So it is also known as‘Ionosphere’or Thermosphere. The radio waves of different length are reflected back from this layer.

5. Exosphere: The region beyond the Thermosphere is called Exosphere. It extends to about 1,000 km and the gravity of the Earth s too weak in this layer. Magnetosphere is found above this layer. Atmospheric layer in between 500-700kms is known as Exosphere and the atmosphere lying beyond is called‘Magnetosphere’.

Question 29.
Explain the factors influenced on the distribution of temperature.
Answer:
The distribution of temperature on the surface of the earth is not uniform. It varies from. region to region due to various factors. The various factors affecting the distribution of atmospheric temperature are:

a. Latitude or distance from the equator: Places close to the equator have higher temperature and are warmer than places awaylfom the equator This is because the Sun rays reach the Earth after passing rays reach the Earth after passing through the layers of the atmosphere. In the low latitudes the Sun rays are direct and have to travel a lesser extent through the atmosphere. Hence, the heat of these rays is more intense. But in high latitudes the Sun rays are slanting and have to passes through a greater extent of atmosphere.

b. Altitude: Temperature decreases with altitude. This is because the heat absorbing elements are found in lower altitude. So the places near the Earth’s surface are warmer than places higher up. This is because air near the surface is denser and contains gases like carbon dioxide, water vapour and other gases. Temperature decreases with increase in height at an average rate of l°C/165m or 6.4°C/1000m.

c. Distance from the sea: this factor also influence on the distribution of temperature and differential heating of land and water. Land gets heated faster compared to water. Water takes longer time to get heated and to cool than land. Hence during the day when the land gets heated quickly, water takes longer time and remains cool. Therefore, during the day time a land gets more heat than the surrounding water bodies.

d. Ocean currents: It increase or decrease the temperature of the Earth’s surface. Warm ocean currents along the coast make the coastal areas warmer and cold currents reduce the temperature and cool the coastal areas.’ Warm currents can be noticed on the eastern margins of the continents in the middle latitude, while .it is the concurrents flow at the western margins of the continents. Gulf stream a warm currents increases the temperature in the eastern coast of U.S.A and California bold current decreases the temperature of the western coast of U.S.A.

e. Winds: Winds that blow from the lower latitudes are warm and make the places warmer. On the other hand, winds that blow from the higher latitudes are cold and make the places cooler. Winds that blow from the sea bring plenty of rain especially if they are warm winds. While off shore winds hardly bring any rain.

f. Clouds: During the day clouds prevent Insolation from reaching the Earth’s surface. Clouds also prevent three escape of terrestrial’s radiation during the night. Clear sky Permits insolation readily during the day time and allow the rapid escape of terrestrial radiation during the night.

Question 30.
Explain the topography of the ocean floor with a diagram.
Answer:
On the basis of the depth, the ocean floor can be divided into four zones, parts or relief features. They are.

1. The continental Shelf: The gently sloping portion of the continent or land that lies submerged below other sea is called the continental shelf. The continental shelf has a very gentle slope. It extends form the shore line to depths between 180 and 200 meters. Average width of the continental shelves is about 48km. The extent of the continental shelf depends on the relief of the broadening land masses.

If the coastal area is a plateau area, the continental shelf will be very broad. On the other hand, if the coastal region is hilly or mountainous, the continental shelf will be very narrow or even absent for example the Atlantic Ocean has 2.3%, the Pacific Ocean has 5.7% and the India Ocean has 4.2%.

2. The continental slope: The zone of steep slope that descends from the edge of the continental shelf to the deep sea plains is called “continental slope”. It is the transitional zone lying between the continental shelf and the deep sea plains. The continental slope is very steep. It extends from 182 meters to 3.600 meters. The angle of the continental slope is 2 to 5 degre3es or even more. It occupies only 8.5% of the total area of the ocean floor. But it varies from ocean to ocean. The Atlantic Ocean has broader continental slopes and accounts for 12.4%. But it is 7% of the Pacific Ocean and 6.5% of the Indian Ocean.

3. The deep sea plains: The level and rolling areas of the ocean floor are generally called deep sea plains or abyssal plains or the ocean plains. They lie between 3,000 and 6,000 meters below other surface of the ocean. They occupy vast area of the ocean floor and account for about 82.7% of the total sea floor. They cover about 90% in the Indian Ocean. Their depth ranges from 5,000 to 6,000 meters. They are covered by oozes, which are the remains of deep sea creatures and plants, and of red volcanic dust.

4. The Ocean Deeps: The long narrow and deep troughs on the ocean floor are known as ‘ocean deep’ or ‘trough’. They cover only 1% of the ocean floor. They are most common neat the coasts where young fold mountains, volcanoes and earthquakes abound. Some they are tectonic in origin. They are the deepest portions of the ocean. Deeps may be caused due to tectonic forces, i.e. faulting earthquakes etc. There are 57known deeps. Of these 32 are found in Pacific Ocean, 19in the Atlantic Ocean and 6 in the Indian Ocean. The deepest trench in the world is Challenger deep located in Mariana Trench to the west of Philippines in the North Pacific Ocean.

Question 31.
Name the important physical divisions of India. Explain the himalayas.
Answer:
India is characterized by great diversity in its physical features. On the basis of physiography, the country is divided in to four major physical divisions. They are:

1. The Northern Mountains
2. The Northern Plains
3. The Peninsular Plateau
4. The Coastal Plains and Islands

The Himalayas: This is loftiest and snow covered mountains in the world. The area occupied by the Himalayas was earlier a part of ‘Tethys Sea’. The formation of this mountain is by tectonic forces of Gondawana land Angara land masses. It is situated to the north of the Indus and Ganga and the Brahmaputra plains.. The slopes of the Himalayas are gentle towards the north and steep towards south.

The Himalayas have distinct characteristics of high relief, snow covered peaks, complex geographical structures, parallel separated by deep valleys and rich temperate vegetation.The Himalayas are classified into three parallel ranges based on altitude and latitude.

The Great Himalayas or Himadri The lesser Himalayas or Himachal The Outer Himalayas or Siwaliks.

a. The Great Himalayas or Himadri: These are the inner most loftiest and continuous ranges of mountains. The average height of the Great Himalayas is 6200 m and the width varies between 120 and 190 km. The important peaks of great Himalayas in India are, Kanchenjunga-8598m in Sikkim, Nanga Prabat-8126m, Nandadevi, Badrinath, Karmet, Trishuletc.

b. The lesser Himalayas or Himachal: These ranges are also known as Inner Himalayas or Himachal ranges. It is situated between great Himalayas inn the north and Outer Himalayas or Siwaliks in the south. Its average height is around 1500-4500m and the width is about 60 to 80 km. These are very rugged and complex ranges due to erosion by rivers. The important ranges in Lesser Himalayas are Pirpanjal, Dhaul Dhar and nag- tiba etc. The important Hill stations are Shimla, Musooire, Ranikeht, Nainital, Almora, Chakrata, Darjeeling etc. Kulu valley, Kangra valley, Spiti valley are the famous valleys ofHimachal.

c. The Outer Himalayas or Siwaliks: These are the outer most ranges situated to the south of Lesser Himalayas, known as Siwaliks. The Siwaliks extend from Jammu & Kashmir in the North West to Arunachal Pradesh in east. The average height of this range is around 600-1500m and its width varies between 15-5Qklm. The siwaliks are formed from the sediments brought down by the rivers of lesser, and Greater Himalayas.

There are flat floored structure valleys between Siwaliks and Lesser Himalayas, Known as Siwaliks. The Siwaliks extend from Jammu&Kashmir in the North West to Arunchal Pradesh in east.

Question 32.
Compare the North Indian rivers with South Indian Rivers.
Answer:

Question 33.
What is soil? Explain the major types of soils.
Answer:
Soil is the minute or finer rock particles found on the surface of the Earth. It is formed naturally, due to the weathering of rocks, under the influence of climate.

The main types of soil in India are:

1. Alluvial soil: This soil is formed by depositional work of rivers and they are mainly found in the flood plains and deltas. Alluvial soil covers largest geographical are in the country. They are mainly distributed in the river plains of the Ganga, Brahmaputra and the Indus. Uttar Pradesh has the largest area under alluvial soil. It is also found in the deltas of east flowing rivers. Alluvial soils are classified into two types.

• Bhangar: Older alluvium, coarse and pebble like in nature, found at the lower depths of the plain.
• Khadar: New alluvium, finer in nature, found in the low lying flood plains and rich in fertility

2. Black soil: The black soils covered more area in peninsular plateau. This soil is also called ‘Cotton soil’ or “Regur soil”. It is derived from the weathered basalt rocks. This soil holds water from long period and become hard whenever it is dry. It is light-black to dark-black in colour. Maharashtra and Gujarat Madhya Pradesh, Karnataka, Andhra Pradesh and Tamilnadu. Black soils are good for Cotton, Sugarcane, Tobacco, Pulses, Millets, Citrus fruits, etc.

3. Red soil: This soil is formed by the weathered granite rocks. It is red in colour and rich in ferrous content. Red soil covers the second largest area in the country. Largest parts of peninsular region are covered with red soil. TamilNadu has the largest distribution of this soil in the country. Rice, Ragi, Jowar, Groundnut, Tobacco, Millets are the major crops cultivated in this soil.

4. Laterite soil: The hot and humid tropical regions of India are rich in laterite soil. This soil is derived from the fragmentation and disintegration of rocks in the mountain ranges. It is mainly found in the Western Ghats, parts of Eastern Ghats and Northeastern hills of India. Plantation crops like Tea, coffee, Rubber, Cashew nut are cultivated in this soil.

5. Desert soil: This soil is also called arid soil. They are mainly found in the desert and semi-desert regions of Western and North western parts of India. This soil has the least water holding capacity and humus content. Generally it is not suitable for cultivation of crops. This soil is mainly found in Rajasthan, parts of Gujarat and Haryana. With water facility crops like Bajra, Pulses and Guar ar cultivated in this soil.

6. Mountain Soil: The Himalayan mountain valleys and hill slopes are covered with Mountain or Forest soil. It is found in the mountain slopes of Jammu and Kashmir, Himachal Pradesh, Utarkhand regions, Crops like Tea, Almond, saffron are cultivated in this soil.

Question 34.
Explain the important measures of conservation of forest.
Answer:
The conservation of forest is concerned with proper utilization of forest, protection from destructive influences, misuses of forests etc.

The important measures of conservation of forest are:

1. Careless felling of tree, over-grazing and shifting cultivation should be avoided. Afforestation should be practiced.
2. Forest fires, pests and diseases should be controlled through the scientific methods.
3. Encroachers of forest area should be severely punished.
4. Forest education, research and training should be expanded through programmes like vanamahotsava, social forestry, and reforestation.
5. Industrial and mining activities in the forest regions should be compensated by reforestation.
6. Development of Green belts in the urban areas.
7. Plantation of trees along the roads, railway lines, river, canal banks, tanks and ponds.
8. Use of fuel wood, wood-charcoal by the tribal people must be prohibited.
9. Government should promote intensive tree planting programmes in urban centers.
10. Massive awareness about the aesthetic of forests should be created through mass media, workshops, live programmes etc.

IV. Answer any one of the following. (1 × 10 = 10)

Question 35.
What is a rock? Describe the different types of rocks.
Answer:

Rock refers to the hard and resistant materials of the earth’s crust. But scientifically rock includes even soft and loose materials like chalk, clay, etc. So, rock refers to any solid materials, hard or soft of which the crust of the earth is formed. All rocks do not have the same chemical composition. But minerals have their own chemical compost in and physical prosperities. .The earth’s crust is made up of various types of rocks

Types of Rocks: Rocks can be classified into three major groups on the basis of their origin or mode of formation. They are:

A. Igneous rocks: The term Igneous is derived from the Latin word “Ignis”, means lire. Thus the igneous rocks are formed by the cooling and solidification of molten material which is called magma. Igneous rocks are also called primary rocks, because they were the firs to be formed. As they are the rocks from which all other types of rocks are derived, they are also called parent rocks.
Igneous rocks are commonly classified on the basis of mode of formation into two major types.

1. Intrusive rocks
2. Extrusive rocks.

1. Intrusive rocks: The magma cannpt escape out to the earth’s surface, it cols slowly inside the earth’s crust and hardens into rock. This type of rock is known as Intrusive Igneous rock. E.g. Granite and dolerite. These rocks can be divided into two type’s a. Plutonic rocks and b. Hybabyssal rocks.

a. Plutonic rocks: The rocks which are formed due to cooling of magma at great depth inside the earth are called Plutonic igneous rocks.
b. Hybabyssal rocks: These are intermediate rocks between the extruded volcanic rocks and the deep plutonic rocks. They are formed due to cooling and solidification of magma in cracks, pores, crevices etc.

2. Extrusive rocks: Rocks formed by cooling and solidification of lava on the surface of the Earth is called extrusive igneous rocks. E.g. Basalt.

B. Sedimentary Rocks: These rocks which are formed due to aggregation and compactness
of sediments are known as sedimentary. In other words, sedimentary rocks are formed bye day the deposition of sediments derived form older rocks, planets and animals remains by river, winds, glaciers etc and these sediments are hardened into rocks by pressure. As they are formed by the consolidation of sediments. They are called sedimentary rocks. They are also called stratified rocks,

a. Mechanically-formed rocks: The rock which have been formed form the accumulation of rock materials, derived form other rocks and have been cemented together are known as “ Mechanically formed rocks.” The mechanically formed rocks consist of sediments which have been carried and deposited by rivers, glaciers, winds or waves and cemented together with clay or line. On the basis of rock materials. These rocks can be divided into three main categories. They are: Rudaceous rocks, Arernaceous rocks and Argilious rocks.

b. Chemically formed rocks: The chemical often settle down and hardened to form rocks known as chemically formed rocks. For example: Gypsum and rock salt, running water dissolves and carries chemicals and where evaporation takes place, these chemicals are deposited at the mouth of springs, caves or caverns or in lakes. Rock salt and gypsum are formed form deposit of salt in strata on the beds of lakes.

c. Organically formed rocks: Organic rocks are formed form the remains of organisms, i.e. of animals and plants. Examples: coal, limestone etc. On the basis of lime and carbon content, organically formed rocks can be divided into two kinds, namely.

(i) Calcareous rocks: Calcareous rocks are formed mostly from the remains of living organisms. These rocks contain calcium carbonate or lime. They include limestoneand chalk. They are porous and soluble.

(ii) Carbonaceous rocks: These are formed due to the transformation of vegetative matter. Under the impact of heat and pressure the remains of plants are turned into hard layers. E.g. coal.

C. Metamorphic rocks: Rock which has been changes either in form or in composition without disintegration is called metamorphic rocks. These rocks are metamorphosed from igneous sedimentary rocks. Igneous and sedimentary rocks may undergo chemical and physical changes because of pressure and heat and form metamorphic rocks. The intense heat and pressure in the earth’s curst alters the composition and appearance of rocks completely or partially to produce a new type of rocks. In this manner metamorphic. rocks are formed. Marble, Diamond, Quartzite, Ruby, Emerald are the examples of metamorphic rock.

Question 36.
Describe the landforms associated with river work.
Answer:
River is an important external agent of denudation on the ever-changing face of the Earth. The work of river is more or less common in all the drainage systems of the world.
The work of river consists of three closely interrelated activities.

1. Erosional work: The process of wearing and taking away the part of rock is known as ‘Erosion’. It depends upon the volume and velocity of water, nature of slope and the nature of rocks. The erosional work of the river is performed in two ways.
a. The Mechanical and b. The Chemical erosion.
There are various Iandforms associated to erosional work of river.

a. ’V’ Shaped valley: In the mountain course the speed of the river is greater and volume is less. As the water rushes down the steep slopes there is maximum vertical , or later erosion. The rapid down cutting or vertical erosion results in the formation of ‘V’shaped valley.

b. Gorge: A deep and narrow valley with steep rocky, sides in the river course is known as ‘Gorge’. They are formed by the regular vertical cutting by the rivers in the valleys eg. Narmada gorge.

c. I shape valley: Avey steep, deep river valley formed by the river, lookinglike T, is called ‘I’ Shaped valley. These are very deep compared to gorges.

d. Canyon: It is a wide, deep and steep valley almost with vertical walls like feature found in the arid or semi arid regions is called ‘Canyon’ eg. Grand Canyon of River Colorado in USA.

e. Potholes: These are the small depressions in the rocky beds of other river valley. They are formed by corrosion. Pebbles, sand and small rocks carried by the river swirled around on the river bed. This action erodes the rock on the river bed forming potholes.

f. Waterfalls: Huge volume of water falling from a great height along the course of a river is called “Waterfalls’. They are formed when the hard and soft rocks come in the way of flowing river. The soft rock gets eroded faster and hard rock does not erode easily. Therefore huge amount of water falls from great height and creates waterfalls. Eg. The Jog falls, The Angel falls, The Victoria falls.

g. River Capture: It is formed mainly due to head-ward erosion by the river near its source. When the source of a river is captured by another major and strong river it is called‘River Capture’.

2. Transportational work: The process of carrying away the eroded materials is known as ‘Transportation’. The rock materials and eroded particles carried by a river is called its Load. The transportation capacity of a river is based on velocity of water, volume of water, load, slope, smooth valley floor etc.

The major landforms associated with the transportational work of the river are:

a. Alluvial fans: The term alluvium refers to the debris transported and deposited by rivers. When the fast flowing river enters the plateau or plain region, it experience sudden decline in gradient and obstruction in its path. Due to obstruction of the river spreads and deposits many of its light materials in fan shape known as ‘alluvial fans’.

b. Alluvial cones: In the plateau and foot hill region when the river spreads out, the eroded materials carried by the river is deposited in conical shape called ‘Alluvial cones’.

3. Depositional work: The process of carrying and accumulating the eroded materials by the river at the lower course is called ‘deposition’. In the lower course due to gentle slope the river slows down and deposits most of its materials on the banks, course and the mouth.

The important landforms resulting from depositional work of the river are:

a. Meanders: In the lower course, river flows slowly in zig zag or curved manner due . to smaller obstruction in its path. A curve or loop formed by the river in its path is called ‘Meander’. When the river course formed by such crescent shaped loops due to continuous lateral deposition it is called meandering course.

b. Ox-bow Lakes: The ox-bow lakes are formed by depositional and erosional actions taking place simultaneously and they are a result of excessive meandering. The River which flows through the shorter route leaving the curve of the meander cut off and crescent shaped lake is formed known as‘Ox-bow lakes’.

c. Flood Plains: When the river is in floods the water overflows on its bank and spreads in the surrounding regions. The silt carried by the water gets deposited in these areas and creates flat plains on both the banks of the rive known as ‘Flood Plains’.

d. Delta: A triangular shaped alluvial deposition forced at the mouth of the river is called ‘Delta’. Important types of deltas are

a. Arcuate or Common delta
b. Bird-foot delta

e. Distributaries: As the river approaches the sea or Ocean, due to reduction in gradient, joining of tributaries, its volume increases, speed decreases hence, the rivet begins to break up into a number of branches from the main river called ‘Distributaries’.

f. Estuary: Estuaries are the tidal mouth of a river having a narrow, gradually widening lay at the mouth. In Estuary River water is mixed with seawater. Eg. The Narmada estuary, The Kali estuary.

V. A. Answer the following in a sentence each : (5 × 1 = 5)

Question 37.
What is Map?
Answer:
A map is defined as a symbolical and conventional representation of the earth or a portion it drawn to scale on a flat surface and bounded by the geographical co-ordinates as viewed from above.

Question 38.
What is a scale?
Answer:
A scale is the ratio of the distance between two points on the map and their corresponding distance on the ground.

Question 39.
What is index?
Answer:
The features show on a map is indicated by a guide called map index.

Question 40.
Give examples for small scale map.
Answer:
The Maps drawn on the scale below 1cm: 15Km or 1: 15.00,000 eg. Atlas and Wall Maps. These maps show broad physical and cultural features.

Question 41.
What is Topographical map.
Answer:
To show relief features, forests, land uses, river system, roads, railways, pipelines, distribution of rural and urban settlements etc.

B. Write the latitude and longitude for the given places. (5 × 1 = 5)

Question 42.
Mysore
Answer:
12° 18’ N to 76°38’ E

Question 43.
Tumkur
Answer:
13°20’N to 77°06’E

Question 44.
Mangalore
Answer:
12° 51’ N to 74°50’ E

Question 45.
Haveri
Answer:
14° 48’N to 75°24’E

Question 46.
Bidar
Answer:
17° 54’ N to 77°35’ E

C. Draw diagram to the following. (2 × 2 = 4)

Question 47.
Pressure belts of the Earth.
Answer:

Question 48.
Layers of the Earth’s Interior
Answer:

D. Draw the outline map of India, mark and name the following (2 × 3 = 6)

Question 49.
Draw outline map of India
Answer:
Physical divisions of India

Question 50.
Southwest and Northeast monsoon winds.
Answer:
Forests of India

Question 51.
Great Nicobar and Nanda Devi.
Answer:
Biosphere Reserves

1. Nanda Devi Saikhawa
2. Nokrek
3. Manas
4. Dibru
5. Dehang Debang
6. Sunderbans
7. Gulf of Mannar
8. Nilgiri
9. Great Nicobar
10. Similipal
11. Khanghendzonga
12. Panchamarhi
13. Agasthymalai
14. Achanakmari – Amar Kantak

 

Students can Download 1st PUC Geography Model Question Paper 1 with Answers, Karnataka 1st PUC Geography Model Question Papers with Answers helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka 1st PUC Geography Model Question Paper 1 with Answers

Time: 3 Hrs
Max. Marks: 100

Note:

1. Answer all questions.
2. Draw maps and diagrams wherever necessary
3. Questions No.V is on Cartography.

I. Answer the following in a word or a sentence each. ( 1 × 10 = 10 )

Question 1.
Which branch of Geography deals with heavenly bodies of the space?
Answer:
Astronomical Geography is the study of the heavenly bodies of the space

Question 2.
What is an ‘Orbit’?
Answer:
The path on which the earth revolves around the Sun is called ‘Orbit’.

Question 3.
What is Volcano?
Answer:
A volcano is an opening in the crust of the Earth through which heated materials consisting of gases, hot water, lava and fragments of rocks are ejected from the interior of the Earth.

Question 4.
What is weathering?
Answer:
The process of disintegration and decomposition of rocks is known as “Weathering”.

Question 5.
What is Stratopause?
Answer:
Stratopause is the boundary between Stratosphere and Mesosphere.

Question 6.
What is Salinity?
Answer:
It refers to the amount of dissolved solids in the ocean water. In other words. It means the amount of salt in the ocean water. ”

Question 7.
Define the term Biodiversity.
Answer:
The varied range of flora and fauna found within a specified geographic region is called ‘Biodiversity’ .

Question 8.
In which Island of India, is ‘Indira Point’ situated?
Answer:
Indira point located at Great Nicobar Island.

Question 9.
Mention the major stream of river Ganga.
Answer:
The two major streams are Alakananda and Bhagirathi.

Question 10.
What is drought?
Answer:
The term drought is applied to an extended period when there is a shortage of water availability due to inadequate precipitation, excessive rate of evaporation and over utilization of water from the reservoirs other storages, including the ground water.

II. Answer any ten of the following in two or three sentence each. ( 2 × 10 = 20 )

Question 11.
How is Geography a discipline of synthesis?
Answer:
It is considered to be a liaison subject. It recognizes the fact that the world is a system of interdependency. Geography as an integrating discipline stands midway between Natural Science and Social Science.

Question 12.
What is inclination of the Earth?
Answer:
The Earth’s axis is not at right angle (perpendicular) to the plane of the elliptical orbit. The axis is inclined at an angle of 66 1/2° to the plane of the orbit. This is known as ‘Inclination of the Earth’s axis’.

Question 13.
State the difference between Focus and Epicenter.
Answer:
The point in the interior of the Earth from where the earthquake tremors originate is called the seismic focus. Earthquake tremors move from the focus in all directions.
The point o the Earth’s surface vertically above the focus is called the epicenter. The Earthquake is felt first at the epicenter.

Question 14.
Distinguish between Oxidation and Hydration?
Answer:
The rain water with oxygen reacts on rocks containing iron and produce oxides. This chemical reaction is known as Oxidation.
The rock minerals take up water, the increased volume creates physical stress within the rock.
As a result certain minerals like feldspar and gypsum are reduced into powder. This process is ‘ called “Hydration”.

Question 15.
Mention the features of Inversion of Temperature.
Answer:
It is a process of temperature increases with increasing height in troposphere. This feature is common during winter season, less cloudiness, slow movement of winds, and clear sky in the mountain valley.

Question 16.
Mention the divisions of Atlantic Ocean currents?
Answer:
There are three divisions of Atlantic Ocean currents are a. Equatorial currents b. Current of North Atlantic Ocean and current of South Atlantic Ocean.

Question 17.
Mention any four types of biomes.
Answer:
Major types of biomes are a. Forest biome b. Savanna biome c. Grassland biome d. Desert biome

Question 18.
Name the water bodies that surround India.
Answer:
India is a peninsula, located at the north tip of the Indian Ocean. It is bordered by the Arabian Sea in the west, Indian Ocean in the south and Bay of Bengal in the east.

Question 18.
Mention any four consequences of natural hazard and disasters.
Answer:
The most important consequences of natural disasters are los of human life and property, animal wealth, destruction of vegetation etc. Natural disasters create fear, anguish and trauma in the human beings leading to various physical, biological and psychological changes. Natural disasters affect population, its distribution and density. It affects on agriculture, cropping pattern, industries, transport and communication, public health, water supply.

Question 19.
What is Biogeochemical Cycle?
Answer:
The cyclic movement of elements of the biosphere between living organism (the biotic phase), and their non-living (a biotic) surroundings (e.g. rocks, water, air etc.) is termed biogeochemical Cycle.

Question 20.
What is meant by the word ‘Monsoon’?
Answer:
The word ‘Monsoon’is derived form the Arabic word ‘Mausam’which means season. Hence, the word ‘Monsoon’ implies the seasonal reversal in the wind pattern over the year. It reveals the rhythm of season and changes in direction of winds. There is also ca change in the distribution pattern of rainfall and temperature, with the change of seasons. The monsoon winds move six months from sea to land and another six months from land to sea.

Question 21.
Name any four factors that affect soil erosion.
Answer:
High Temperature, Rainfall wind and waves are the natural agents. Deforestation, over grazing, shifting cultivation, unscientific methods of agriculture cause soil erosion.

Question 22.
Write the salient features of Evergreen forest.
Answer:
These forests are found in the.regions of heavy rainfall (above 250 cm) and high temperature (above 27° C) Tall umbrella shaped trees with dense assemblage is a prominent feature of this forest. The evergreen forests always look green because, various species of trees are found here and they shed leaves in different seasons.

III. Answer any eight of the following in 25 to 30 sentences each. ( 5 × 8 = 40 )

Question 23.
Explain the important branches of Physical geography. (T. B. Qn)
Answer:
1. Physical Geography.
The field of physical geography is wide as it includes the study of the entire surface of the earth and also its physical and biological process as well as their morphology. Modern geography has witnessed the development of many branches and some of them even grown into separate disciplines.

Some of the important branches of physical geography are as follows:

• Geomorphology: It is a systematic study of landforms, such as mountains, plateaus, plains, valleys, etc.
• Climatology: Climatology encompasses the study of structure of atmosphere and elements of climates and climatic types and regions.
• Meteorology: The scientific study of atmosphere condition is called meteorology.
• Pedology: It is the scientific study of soil formation, structure, texture, chemical composition and their influence on plant growth.
• Hydrology: Hydrology studies the realm of water over the surface of the earth including oceans, lakes, rivers and other water bodies and its effect on different life.
• Seismology: It is the study of Earthquakes, their effects and distribution.
• Astronomical Geography: It is the study of heavenly bodies of the space like planets, satellites, stars etc in relation to the earth.
• Volcanology: It is the scientific study of tectonic process of volcanoes.
• Astronomical geography: It is the study of heavenly bodies of the space like planets, satellites, stars etc in relation to the earth.
• Bio-geography: It is the systematic study of the distribution of plants and animals.
• Hydrology: The study of water on the earth’s land is known as hydrology.
• Oceanography: The study of waves, tides and currents and the other characteristics of oceans, known as oceanography.

2. Human geography: It deals with man and his activities particularly cultural environment factors on man made factors, Important among them are culture, Society, agriculture, mining, industry, transport forming trade population etc.
Some of the important grander of Human geography are as fallows:

• Political geography: It deals with spatial unit, people distribution, political behavior, political divisions etc.
• Economic geography: It refers to basic attributes of the economy such as production, distribution exchange of goods and consumption. It deals with the spatial aspects of production, distribution and consumption and also helps on understanding the most proper location for establishing different human activities.
• Commercial Geography: It deals with the spatial distribution of trade and commercial practices etc.
• Population Geography: It helps to understand the distribution, growth density, migration and various other components of population.

Question 24.
Explain the effects of the rotation of the Earth. (T.B. Qn)
Answer:
Rotation of the Earth causes various effects. They are:
a. Day and night caused by the rotation of the earth on its axis. This is because parts of the earth which face the sun have day and the parts which do not face the sun have night. This happen with precision and progression and not suddenly – The time when the sun beings to cast its light in the sky is known as dawn. At noon. The sun is overhead. At dusk, it is twilight and the sun is seen disappearing in the sky. At night, it is completely dark.

b. The duration of the day and night is not equal at all places on the earth because of the inclined axis. The length of days varies with respect to the seasons as well as latitude

c. The sun, the moon and the stars seem to move from east to west. This is because the earth spins from west to east. This effect is similar to what one experiences while looking at trees from a moving train.

d. The speed of rotation has created a centrifugal force resulting in a bulge in the middle portion of the earth and flattened top at the poles.

e. The earth’s rotation affects the movement of water in the oceans. The tides are deflected because of the rotation of the earth.

f. Rotation causes difference in time over various places on the earth.

g. The Earth acts as huge magnet: The one end of the needle of the compass always points towards the north magnetic pole. That means, the earth acts as a magnet. The rotation . of the earth causes the earth to act as a magnet.

h. Rotation of the Earth influences the movement of ocean water, particularly ocean currents.

i. The rise and fall in the sea level is called tides. Rotation of the Earth causes the lacing of water bodies to the Moon. The gravitational attraction of the Moon and position of the water bodies cause tides. This is a regular phenomenon due to Earth’s rotation.

Question 25.
What is an Earthquake? Describe the causes and effects of earthquake. (T.B.Q)
Answer:
An Earthquake is a sudden vibration or oscillation in the Crust of the Earth. It is a form of energy of wave motion transmitted through the surface layer of the Earth. The place of origin of an Earthquake in the Earth’s crust is called ‘Focus’. The point on the Earth surface which is perpendicular to the focus, receiving seismic waves is called ‘Epicentre’.

Causes of Earthquake: On the basis of occurrence earthquakes can be classified into three types. They occur due to several causes such as tectonic forces, folding, faulting, volcanic eruptions landslides, avalanches, man-made factor.

Tectonic Earthquakes: These are caused due to folding, faulting and displacement of blocks of rocks in the Earth’s crust. They are highly intensive and destructive seismic activities.

Volcanic Earthquakes: These are associated with the volcanic activities and are usually caused at great depths. They are with low intensity and magnitude. The destruction and damage are slightly lesser than earthquakes caused by Tectonic forces.

c. Earthquakes caused by man-made factors: Over interaction of man underground nuclear explosion etc, are causing great change in the crustal formation leading to seismic activity. E.g. Koyna dam (India)-1967, Hoover dam (U.S.A)-l 935, Mangladam (Pakistan). Effects of Earthquakes: Earthquakes cause violent disturbances and widespread damage and destruction, especially on the epicentre region.

• Earthquakes cause changes in the earth’s surface. Cracks and fissures develop in the earth’s crust.
• Vibrations, caused by earthquakes, lead to landslides in mountainous regions, damming the rivers.
• vertical or horizontal cracks are formed, and the land is elevated or lowered, forming lakes.
• Deep cracks may be developed in dams after the earthquake. For instance, deep cracks were developed in the Koyna dam after the earthquake.
• The beds of rivers may be raised by the earthquakes. For example, the bed of the river Brahmaputra was raised during the Assam earthquakes.
• here is the greatest danger of falling of houses, roads railway lines factories, bridges, dams, aerodromes, and other man-made structures, resulting in loss of life and property.
• The underground water system is disturbed.

Question 26.
Explain chemical weathering with examples.
Answer:
Disintegration and Decomposition of rocks by chemical processes is called “Chemical weathering”.
In this process secondary or new minerals are developed from the original minerals of the rocks. The rain water and atmospheric gases are the main agents of chemical weathering. It is vey common in humid regions.

There are four types of chemical weathering process. They are:

• Oxidation: The rain water with oxygen reacts on rocks containing iron and produce oxides. This chemical reaction is known as “oxidation”. The common process of rusting of iron is an example of oxidation.
• Carbonation: The rain water with carbon-di-oxide becomes a weak carbonic acid and it reacts with calcium carbonate or limestone to form calcium bicarbonate, which dissolves easily. This process is called “Carbonation”. It is very active in limestone regions.
• Hydration: The rock minerals take up water the increased volume creates physical stress within the rock. As a result certain minerals like feldspar and gypsum are reduced into powder. This process is called “Hydration”.
• Solution: The rain water is able to dissolve some of the soluble minerals, such as rock- salt, gypsum, potash. This process is called “Solution”.

Question 27.
Explain the structure of the atmosphere.
Answer:
The distribution of temperature is not uniform at different height of the atmosphere. Along with the variation of temperature there are unique features at different heights. Based on these characteristics atmosphere is divided into four parallel zones.

1. Troposphere: It is the lowest layer of the atmosphere and les closer to the earth. The word ‘Tropos’ means ‘turn’ It extends up to 18km at the equator and 8km at poles. Thus the average height is about 10-12km. The important feature of the troposphere are:

Hydrological cycle: It is confined to troposphere. The water evaporates and raised up, formation of clouds takes place. Later it is precipitated in various forms like rain, snow and hailstone. These processes are known as evaporation, condensation and precipitation.

Lapse rate: In this layer the temperature decreases at the rate of 6,5’ Celsius per every 1000 meters of height which is known as ‘lapse rate’.

Clouds: It is characterized with formation of clouds, thunder storms and lighting.
Gaseous Mass: The troposphere has about 75 percent of the total gaseous mass, The upper part of troposphere is known ‘Tropopause’.

2. Stratosphere: It lies above the tropo-sphere and extends up to 50km from the earth. The temperature is also most unifonnly distributed. Hence it also known as isothermal zone. At a height of 22kms. There is a thin layer of ozone which absorbs ultraviolet rays of the sun. So it is called as ozOnosphre. The name staratopause is given to the upper part of the stratosphere.

3. Mesosphere: It extends from 50 to 80kms. It is an intermediary zone between the lower and upper layers of the atmosphere. A thin layer of air separating mesosphere from the other upper layers in named as‘Mesopause’.

4. Ionosphere: It extends from 90 to 500km. It consists of atoms of air ionized due to intensive temperature. So it is also known as ‘Ionosphere’or Thermosphere. The radio waves of different length are reflected back from this layer.

5. Exosphere: The region beyond the Thermosphere is called Exosphere. It extends to about 1,000 km and the gravity of the Earth s too weak in this layer. Magnetosphere is found above this layer. Atmospheric layer in between 500-700kms is known as Exosphere and the atmosphere lying beyond is called‘Magnetosphere’.

Question 28.
What is a mineral? Explain the types of minerals.
Answer:
Mineral is a natural inorganic substance which has certain chemical and physical properties. The scientific study of minerals is called Mineralogy. Minerals are used by man for various human activities. Understanding them minerals their types and uses is very important as natural resources of the earth.

Types: Minerals are classified into different types on the basis of nature, texture, and sues. Important among them are,

1. Metallic Minerals: These minerals are not in metallic form and they do not contain metal. A few non-metallic minerals are Mica, Asbestos, Sulphur, lead, Zinc, Phosphate etc.
2. Non-Metallic Minerals: These minerals are not in metallic form and they do not contain metal. A few non-metallic minerals are Mica, Asbestos, Sulphur, Lead, Zinc, Phosphate etc.

Minerals are also classified into other types.
Ferrous minerals which contain Iron e.g. Iron Ore. Non-ferrous minerals – these minerals do not contain ferrous e.g. Bauxite, Mica. – A few minerals are used for making decorative, commercial and precious ornaments are called Precious minerals. E.g. Platinum, Diamond, Gold and Silver. Some minerals are use for the generation of energy. They are Nuclear or atomic minerals e.g. Uranium, Thorium etc.

Question 29.
What is landform? Explain the different types of geomorphic processes?
Answer:
A land form is any natural formation of rock and dirt, found on the earth. A landform can be as. large as a mountain range or as small as a hill. Landforms are natural features of the landscape, natural physical features of the earth’s surface eg. Valleys, plateaus, Mountains, plains, hills loess plains. The minor landforms include hills, ridges, valleys, basin etc. According to Geo-scientist the landforms are formed by the forces acting from the interior and on the surface of the Earth.

The processes carried out by Endogenic and Exogenic forces are called geomorphic processes. Endogenic forces: The internal forces are also known as endogenic forces. These are mainly the land building forces. Diastrophism includes all these processes; that move, elevate or build portions of the earth’s crust.

The internal forces are also known as endogenic forces. Exogenic Forces: The external forces are also known as Exogenic forces. These forces are found on the surface of the Earth, Which bring changes through degradation and aggradations process. River, glacier, wind, sea waves are the major sources of external forces.

Question 30.
Explain the topography of the Ocean floor with a diagram.
Answer:
On the basis of the depth, the ocean floor can be divided into four zones, parts or relief features. They are.
1. The continental Shelf: The gently sloping portion of the continent or land that lies submerged below other sea is called the continental shelf. The continental shelf has a very gentle slope. It extends form the shore line to depths between 180 and 200 meters. Average width of the continental shelves is about 48km. The extent of the continental shelf depends on the relief of the broadening land masses.

If the coastal area is a plateau area, the continental shelf will be very broad. On the other hand, if the coastal region is hilly or mountainous, the continental shelf will be very narrow or even absent for example the Atlantic Ocean has 2.3%, the Pacific Ocean has 5.7% and the India Ocean has 4.2%.

2. The continental slope: The zone of steep slope that descends from the edge of the continental shelf to the deep sea plains is called “continental slope”. It is the transitional zone lying between the continental shelf and the deep sea plains. The continental slope is very steep. It extends from 182 meters to 3.600 meters. The angle of the continental slope is 2 to 5 degre3es or even more. It occupies only 8.5% of the total area of the ocean floor. But it varies from ocean to ocean. The Atlantic Ocean has broader continental slopes and accounts for 12.4%. But it is 7% of the Pacific Ocean and 6.5% of the Indian Ocean.

3. The deep sea plains: The level and rolling areas of the ocean floor are generally called deep sea plains or abyssal plains or the ocean plains. They lie between 3,000 and 6,000 meters below other surface of the ocean. They occupy vast area of the ocean floor and account for about 82.7% of the total sea floor. They cover about 90% in the Indian Ocean. Their depth ranges from 5,000 to 6,000 meters. They are covered by oozes, which are the remains of deep sea creatures and plants, and of red volcanic dust.

4. The Ocean Deeps: The long narrow and deep troughs on the ocean floor are known as ‘ocean deep’ or ‘trough’. They cover only 1% of the ocean floor. They are most common neat the coasts where young fold mountains, volcanoes and earthquakes abound. Some they are tectonic in origin. They are the deepest portions of the ocean. Deeps may be caused due to tectonic forces, i.e. faulting earthquakes etc. There are 57known deeps. Of these 32 are found in Pacific Ocean, 19in the Atlantic Ocean and 6 in the Indian Ocean. The deepest trench in the world is Challenger deep located in Mariana Trench to the west of Philippines in the North Pacific Ocean.

Question 31.
Briefly explain the Coastal plains of India.
Answer:
This is the region all along the Indian coastline, lying between the coast and the mountain ranges of the peninsular plateau. India has 6100 km from Gujarat in the west to West Bengal in the east. The average width is 10-25 kms. The coastal plain of India is divided into two parts.

The West Coastal plains: It is extends between the Arabian Sea and the Western Ghats. It is narrower than the east coastal plains, stretching to a length of about 1400km and width of 10 to 80km from the Rann of katchchh to Kanyakumari. The west coastal plains have Gujarat, Konkan, Karnataka and Malabar Coasts.

The Gujarat Coast comprises of Rann of Kachchh and Cambay coasts. It is formed by the alluvial deposits of Sabarmati, Mahi, Luni and other small streams. Gujarat has the longest coastline in India Kandla and okha are famous sea ports and along is the biggest ship breaking center. It produces highest salt in the country.

Konkan Coast lies to the south of Gujarat coast and extends line which provides suitable site for natural seaports. Eg: Mumbai, Navasheva, Marmagoa, Karwar, New Mangalore etc., this coast records highest coastal erosion. It is very rich in Petroleum and natural gas. Karnataka coast: it is a part of Konkan coast.

It extends from karwar in the north to Mangalore in the south. It is the narrowest part of west coastal plains. Karwar and New Mangalore are important ports in this belt. Sea Bird, the naval base near Karwar is the largest naval base in India.

The Malabar Coast extends from Mangalore to Kanyakumari, Sand dunes, lagoons and backwaters are the important features of this coast. Cochin or Kochi is the biggest seaport in this coast. Backwaters of Kerala facilitate navigation and tourists enjoy traveling though small country boats. The first south west monsoon rainfall is received in this coast.

East coastal Plains: It lies between the Ea’stern Ghats and the Bay of Bengal stretching from the delta of Hooghly in the North to Kanyakumari in the south. Compared to the west coastal plains the east coastal plains are broader.

The Tatkal Coast: It is the coastal plain of Orissa state. It extend for about 400kmms, north from Subarnarekha river to south of the Rushikulya river. It has a chilka lake, which is the largest salt water lake in India, Para deep is the important horbour located here.

Coromandel Coast: The southern part of east coast is known as the Coromandel Coast. It gets more rainfall from the north east monsoons and it is highly affected by cyclones. The oldest harbor Chennai located here.

Question 32.
Compare the North Indian rivers with South Indian Rivers.
Answer:

Question 33.
Describe the salient features of Salinity of the Ocean water. (T. B. Qn )
Answer:
Salinity of ocean water refers to the amount of dissolved solids in the ocean water. Ocean water consists of various kinds of chemical elements and minerals. Of these constituents, sodium chloride is the most important constituent of ocean water. The other constituents or salts like magnesium chloride, magnesium sulphate, calcium sulphate, potassium sulphate, etc.

Are also present in the ocean or sea water. The ocean water is saline by the rivers which bring huge amount of mineral salt dissolved in water. Another reason for salinity is the evaporation of sea water, by which mineral salt in the sea or ocean water increase every year. Salinity is measured in gram per kg of sea water and it is expressed as part per thousands for examples: 35% it means 35gram of salt in 1000 gram of sea water.

Factors affecting the salinity in the ocean water are: Evaporation, Precipitation, and Fresh water mixing with ocean water, ground water and glaciers increase the percentage of salt content in the ocean. The trade winds drive away saline water to less saline areas resulting the variation of salt content.

Latitudes, precipitation, mixing of fresh water etc. influence on the horizontal and vertical distribution of salinity. The regions near Tropic of Cancer and Capricorn record high salinity due to high temperature, more evaporation, low rainfall and extensive arid and semi-arid areas. While the equatorial region record low sanity because of high temperature and high rainfall. The polar region record least salinity due to very low temperature, evaporation and less rainfall.

Question 34.
Explain the anticyclones.
Answer:
Winds blowing spirally outward from centers of high pressure are known as anti-cyclones. They are just the reverse of cyclones. Their movement is clockwise in the Northern Hemisphere and anti clockwise direction in Southern Hemisphere. They are more common in the sub¬tropical high pressure belts and absent in the equatorial belt. They are circular in shape, larger in size and extent and their track is highly variable. The weather is generally associated with anticyclones is find and dry.

The anticyclones are divided into two groups such as permanent and temporary anticyclones.
Permanent anti-cyclones are mainly centre in the temperate regions where the meeting of tropical and temperate air mass takes place. In between the two temperate cyclones there will be anti-cyclones. In the interior of continents the high pressure centers are developed during the winter season. It is due to lower amount of temperature.

IV. Answer any one of the following. ( 10 × 1 = 10 )

Question 35.
Explain the planetary winds with the help of diagram. (T. B. Qn )
Answer:
Winds which blow from high pressure belts to the low pressure belts in the same direction through out the year are called planetary winds, permanent winds or prevailing winds. Characteristics: The chief characteristics of planetary winds:

• They are connected with the pressure belts. So they blow from the high pressure belt or area to the low pressure belt or area.
• They are regular through out the year.
• They deflect to their right in the northern hemisphere and to their left in the southern hemisphere.
• As a result of the shifting of the pressure belt northward in summer and southward in winter, the planetary winds also shift northwards in summer and southwards in winter. They are permanent and blow over vast areas of the globe. These winds include trade winds, westerlies and polar winds.

1. Trade winds: The winds that blow in the tropics form the sub-tropical high pressure belts towards the equatorial low pressure belt are called “Trade winds”. They found approximately between 8° and 30° latitudes on both sides blowing from the east. They are also known as “Tropical Easterlies”.

The trade winds due to the law of deflection blow from the north-east in the northern hemisphere and from south-east in the southern hemisphere. Trade winds blow from the cooler sub-tropical areas to the hotter area, hence they do not bring rain. However, when they blow over the open sea they gather moisture and bring heavy rainfall to the east coast of the continents.

2. Anti trade winds: The wind blowing from sub-tropical high pressure belts towards sub-polar low pressure belts are known as anti-trade winds. They are south-west to north east in the northern hemisphere and Norwest to south-east in the southern hemisphere.

Hence they are called ‘Westerlies”. They prevail largely between 40° and 650 north and south of the equator. They blow from the north-west in the southern hemisphere and south – west in the northern hemisphere. As they blow from hotter areas to colder areas they bring rain through the year.

3. Polar winds: Winds blowing from polar high pressure belts toward the sub-polar low pressure belts are known as polar winds. They blow from the north east in the northern hemisphere and south east in the southern hemisphere. As they blow form the snow cov4red areas they are very cold winds. They are constant in the southern hemisphere.

Question 36.
Explain the structure and composition of the Earth with a neat diagram. (T.B.Qn)
Answer:
On the basis of the physical and chemical properties of the earth’s surface, behavioral patterns of seismic waves of earthquakes and the lava erupted form volcanoes, it is generally held that the earth is composed of three layers or parts.

1. The crust: The outer or upper most layer of the earth is the crust. It is solid and is the thinnest and lightest part. It is 6to 60 kms thick. It has two layers.
a. Continental crust or sial: The upper part consist of sedimentary and granite rocks’ and forms the continents. Its major constituent elements are silica and aluminum. So, it is termed as sial. Its average thickness ranges between 10-12 km.

b. Oceanic crust or Sima: The lower part of other Crust is known as oceanic crust. Its thickness is around 5 km. This layer is rich in silica and Magnesium. Therefore, it is called Sima. The lower continuous layer is mostly composing of silica and magnesium and so it is termed as sima. The mean density of this layer is 2.95gm. Conrad discontinuity between Sial and Sima and Mohorovicic discontinuity between Crust and Mantle are the major discontinues in the crust.

2. The Mantle: The portion of the earth’s interior, lying beneath the crust and above the core is known as mantle. It is largely made up of basic silicates, rich in iron and magnesium. It extends from 60 to 2,900km. The density of this layer from 3.3 to 5.7gm. The mantle has two parts.

a. Upper Mantle: This is the outer layer of the Mantle known as Asthenosphre. Most of the earthquakes and volcanoes take birth due to disorder in this layer.

b. Lower Mantle: This is the lower layer of the Mantle known as Mesosphere and it is in solid form. Repetti discontinuity between Asthenosphere and Mesosphere and Gutenberg discontinuity between Mantle and Core are the major discontinues in the mantle

3. The core: The core is the central part of the earth’s interior. It extends from the lower boundary of the mantle to the centre of the earth for about 6,400 kms. The most important materials of core are nickel and ferrous (Nife). The core consists of two layers, namely.

a. Outer core: It is the outer layer of the Core consisting hard molten rocks. Most of the materials are in molten form. It extends from 2900km to 4980km.

b. Inner core: It is the lower layer of the Core with very high temperature and pressure. Most of the materials are in solid form therefore, it is called solid core. The average temperature of this layer is around 2900° C. Transition discontinuity is found between Outer. Core and Inner Core.

V. (A) Answer the following in a sentence each. ( 1 × 5 = 5 )

Question 37.
What is Cartography?
Answer:
The science and art of making maps, charts, globes and rile models is known as Cartography.

Question 38.
Define Map.
Answer:
A map is defined as a symbolical and conventional representation of the earth or a portion f it drawn to scale on a flat surface and bounded by the geographical coordinates as viewed from above.

Question 39.
What is Scale?
Answer:
A scale is the ratio of the distance between two points on the map and their corresponding distance on the ground.

Question 40.
What is Index?
Answer:
The features show on a map is indicated by a guide called map index.

Question 41.
Give an example for small scale map.
Answer:
Small Scale maps: The Maps drawn on the scale below 1 cm: 15Km or 1:15,00,000 eg. Atlas and Wall Maps. These maps show broad physical and cultural features.

(B) Identify the latitudes and longitudes for the given places. ( 1 x 5 = 5 )

42. Mysore
43. Tumkur –
44. Mangalore
45. Haveri
46. Bidar
Answer:

(C) Draw diagrams to the following. ( 2× 2 = 4 )

Question 47.
Cycle of Seasons.
Answer:

Question 48.
Orographic rainfall
Answer:

(D) Draw the outline map of India, mark and name the following

Question 49.
Map drawing (2)

Question 50. (2)
Southwest and Northeast monsoon winds

Question 51. (2)
Nokrek and Agasthyamalai biosphere reserves

Answers:
1. Physical divisions of India

2. Forests of India

3. National park and Wild life in India

4. Rivers and Lakes

7. Biosphere Reserves

1. Nanda Devi Saikhawa
2. Nokrek
3. Manas
4. Dibru
5. Dehang Debang
6. Sunderbans
7. Gulf of Mannar
8. Nilgiri
9. Great Nicobar
10. Similipal
11. Khanghendzonga
12. Panchamarhi
13. Agasthymalai
14. Achanakmari – Amar Kantak

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