{"id":5142,"date":"2020-08-30T07:08:12","date_gmt":"2020-08-30T01:38:12","guid":{"rendered":"https:\/\/kseebsolutions.guru\/?p=5142"},"modified":"2021-07-02T15:04:06","modified_gmt":"2021-07-02T09:34:06","slug":"kseeb-solutions-class-8-science-chapter-23","status":"publish","type":"post","link":"https:\/\/kseebsolutions.guru\/kseeb-solutions-class-8-science-chapter-23\/","title":{"rendered":"KSEEB Solutions for Class 8 Science Chapter 23 Earth and Beyond"},"content":{"rendered":"

Karnataka Board Class 8 Science Chapter 23 Earth and Beyond<\/h2>\n

KSEEB Class 8 Science Chapter 23 Textual Questions & Answers<\/h3>\n

I. Four alternatives are given to each of the following incomplete statement\/ questions. Choose the right answer.<\/p>\n

Question 1.
\nThe constellation that helps to locate north star is.
\n(a) Cassiopeia
\n(b) Orion
\n(c) Taurus
\n(d) Leo
\nAnswer:
\n(a) Cassiopeia<\/p>\n

Question 2.
\nThe second biggest planet of the solar system has.
\n(a) lowest density
\n(b) density equal to water
\n(c) highest density
\n(d) density equal to earth.
\nAnswer:
\n(a) lowest density<\/p>\n

Question 3.
\nThe poles of this planet faces the sun for longer periods of time than any other planet.
\n(a) Mars
\n(b) Uranus
\n(c) Jupiter
\n(d) Saturn
\nAnswer:
\n(a) Mars<\/p>\n

Question 4.
\nPolar ice caps of the planet mars are due to.
\n(a) Solidified water
\n(b) solidified carbon dioxide
\n(c) volcanoes erupted near the poles
\n(d) cover of dust particles that reflect
\nAnswer:
\n(b) solidified carbon dioxide<\/p>\n

Question 5.
\nHeatwaves are trapped to the maximum extent in the planet.
\n(a) Mercury
\n(b) Venus
\n(c) Earth
\n(d) Neptune
\nAnswer:
\n(b) Venus<\/p>\n

II. Fill in the blanks with suitable words:<\/p>\n

Question 1.
\nRadio signals are emitted by the planet ………….
\nAnswer:
\nJupiter<\/p>\n

Question 2.
\nThe color of the planet Mars is ………….
\nAnswer:
\nReddish<\/p>\n

Question 3.
\nWinter season constellation is ………….
\nAnswer:
\nOrion<\/p>\n

Question 4.
\nAsteroids are mainly found between the orbits of ………..
\nAnswer:
\nMars and Jupiter<\/p>\n

Question 5.
\nUltraviolet rays from the sun can be filtered by the earth\u2019s atmospheric layer called …………
\nAnswer:
\nOzone layer present in the upper regions of the Stratosphere.<\/p>\n

III. Match the following:
\n\"KSEEB
\nAnswer:<\/p>\n

    \n
  1. (e)<\/li>\n
  2. (d)<\/li>\n
  3. (f)<\/li>\n
  4. (a)<\/li>\n<\/ol>\n

    IV. Answer the following:<\/p>\n

    Question 1.
    \nWhich planet is called morning star or evening star?
    \nAnswer:
    \nVenus.<\/p>\n

    Question 2.
    \nWhich planet was removed from the list of 9 planets in 2006?
    \nAnswer:
    \nPluto.<\/p>\n

    Question 3.
    \nExpress the following in km.<\/p>\n

      \n
    1. 10 light minutes<\/li>\n
    2. 10 light days<\/li>\n
    3. 10 Light year<\/li>\n<\/ol>\n

      Answer:<\/p>\n

        \n
      1. light minutes
        \n10 \u00d7 60 \u00d7 300000 = 180000000 km = 180 million km<\/li>\n
      2. 10 light days
        \n10 \u00d7 24 \u00d7 60 \u00d7 60 \u00d7 300000 = 259300000000 km = 259200 million km<\/li>\n
      3. 10 light years
        \n10 \u00d7 365 \u00d7 24 \u00d7 60 \u00d7 60 \u00d7 300000 = 94608000000000 = 94608000 million km<\/li>\n<\/ol>\n

        Question 4.
        \nName the following:<\/p>\n

          \n
        1. \u00a0Most fascinating planet with a set of ring systems as viewed from a telescope.<\/li>\n
        2. \u00a0Nearest planet to earth.<\/li>\n
        3. \u00a0Nearest planet to the sun<\/li>\n
        4. \u00a0Biggest planet of the solar system<\/li>\n<\/ol>\n

          Answer:<\/p>\n

            \n
          1. Saturn<\/li>\n
          2. Venus<\/li>\n
          3. Mercury<\/li>\n
          4. Jupiter<\/li>\n<\/ol>\n

            Question 5.
            \nHow are satellites different from planets?
            \nAnswer:
            \nPlanets:<\/p>\n

              \n
            1. planets are natural celestial objects<\/li>\n
            2. planets revolve round the sun<\/li>\n
            3. planets are big in size Satellites:<\/li>\n
            4. Satellites may be natural or artificial objects.<\/li>\n
            5. Satellites revolve round the planets.<\/li>\n
            6. Satellites are smaller in size than planets.<\/li>\n<\/ol>\n

              Question 6.
              \nWhich satellite has active volcanoes?
              \nAnswer:
              \nIn a satellite of Jupiter has active volcanoes.<\/p>\n

              Question 7.
              \nGive a reason for the following.
              \nAnswer:<\/p>\n

                \n
              1. A person in England can recognize the pole star easily than a person in Bangalore: Pole star appears to be stationary above the Earth\u2019s North Pole since England lies in the Northern side Northern hemisphere a person in England can recognize pole star than a person in Bangalore.<\/li>\n
              2. Mercury in difficult to observe: It is very difficult to observe mercury because it is very close to the sun and most the time it is hidden by the glare of the sun. However, it can be seen just before sunrise and just after sunset.<\/li>\n
              3. A day on Venus is longer than its year: The period of rotation of Venus is 243 days and the period of revolution is 224 days. Since the period of rotation is longer than a period of revolution, a day on Venus is longer than its year.<\/li>\n
              4. The greenhouse effect is prominent on Venus: Venus is composed mostly of carbon dioxide. There are several layers of clouds many kilometers thick composed of sulfuric acid. This dense atmosphere of carbon-dioxide blocks the long-wavelength infrared radiation and heat is trapped inside, hence the greenhouse effect is prominent on Venus.<\/li>\n<\/ol>\n

                V. State true or false:<\/p>\n

                Question 1.
                \nSaturn has the highest density.
                \nAnswer:
                \nFalse<\/p>\n

                Question 2.
                \nVenus can be seen overhead in the night sky.
                \nAnswer:
                \nFalse<\/p>\n

                Question 3.
                \nAries (Mesha) is zodiacal constellations.
                \nAnswer:
                \nTrue<\/p>\n

                Question 4.
                \nMars contains oxygen in its atmosphere.
                \nAnswer:
                \nTrue<\/p>\n

                Question 5.
                \nMoon has no atmosphere.
                \nAnswer:
                \nTrue<\/p>\n

                Question 6.
                \nTitan is the satellite of Jupiter.
                \nAnswer:
                \nFalse<\/p>\n

                KSEEB Class 8 Science Chapter 23 Additional Questions & Answers<\/h3>\n

                Question 1.
                \nDefine the following terms<\/p>\n

                  \n
                1. celestial objects<\/li>\n
                2. celestial sphere<\/li>\n
                3. horizon<\/li>\n<\/ol>\n

                  Answer:<\/p>\n

                    \n
                  1. celestial objects: The objects in the sky are called celestial objects.<\/li>\n
                  2. celestial sphere: The imaginary sphere centered around us is called the celestial sphere.<\/li>\n
                  3. horizon: The imaginary circle along which the sky appears to meet the ground is called the horizon.<\/li>\n<\/ol>\n

                    Question 2.
                    \nWrite the differences between the geocentric model and the heliocentric model.
                    \nAnswer:<\/p>\n

                      \n
                    1. Geocentric model:\n