{"id":12451,"date":"2020-09-01T10:25:13","date_gmt":"2020-09-01T04:55:13","guid":{"rendered":"https:\/\/kseebsolutions.guru\/?p=12451"},"modified":"2021-07-02T15:04:04","modified_gmt":"2021-07-02T09:34:04","slug":"kseeb-solutions-for-class-7-science-chapter-3","status":"publish","type":"post","link":"https:\/\/kseebsolutions.guru\/kseeb-solutions-for-class-7-science-chapter-3\/","title":{"rendered":"KSEEB Solutions for Class 7 Science Chapter 3 Fibre to Fabric"},"content":{"rendered":"

Students can Download Chapter 3 Fibre to Fabric Questions and Answers, Notes Pdf, KSEEB Solutions for Class 7 Science<\/a>, Karnataka State Board Solutions help you to revise complete Syllabus and score more marks in your examinations.<\/p>\n

Karnataka State Syllabus Class 7 Science Chapter 3 Fibre to Fabric<\/h2>\n

Class 7 Science Fibre to Fabric NCERT Textbook Questions and Answers<\/h3>\n

Question 1.
\nYou must be familiar with the following nursery rhymes:
\n(i) \u2018Baa baa black sheep, have you any wool.\u2019
\n(ii) \u2018Mary had a little lamb, whose fleece was white as snow.\u2019
\nAnswer the following:
\n(a) Which parts of the black sheep have wool?
\nAnswer:
\nThe fine and soft under-hair that grows close to the skin of the sheep have wool.
\n(b) What is meant by the white fleece of the lamb?
\nAnswer:
\nWhite fleece refers to the white hair of lamb that is used to make wool.<\/p>\n

Question 2.
\nThe silkworm is
\n(a) a caterpillar,
\n(b) a larva.
\nChoose the correct option.
\n(i) a
\n(ii) b
\n(iii) both a and b
\n(iv) neither a nor b.
\nAnswer:
\n(iii) both a and b<\/p>\n

Question 3.
\nWhich of the following does not yield wool?
\n(i) Yak
\n(ii) Camel
\n(iii) Goat
\n(iv) Woolly dog
\nAnswer:
\n(iv) Woolly dog<\/p>\n

Question 4.
\nWhat is meant by the following terms?
\nAnswer:
\ni) Rearing: Rearing is raising and taking care of livestock (eg. cows, buffaloes, goats, etc.); for commercial purposes. These animals are fed, provided shelters, and are bred for better yield like milk, meat, wool etc.<\/p>\n

ii) Shearing: Once a sheep develops a thick coat of hair, it is shaved off to obtain wool. The process of cutting off the woolen fleece of sheep with a thin layer of skin is called shearing. It is done by the machines which remove the hair.<\/p>\n

iii) Sericulture: The breeding and management of silkworms for the production of silk is known as sericulture. Different types of silk (eg. mulberry silk, Tassar silk, etc.) with different textures are obtained from different varieties of silk moths.<\/p>\n

Question 5.
\nGiven below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.
\nAnswer:
\nShearing, scouring, sorting, picking of burrs, dying of fibres, making of yarn.
\n\"KSEEB<\/p>\n

Question 6.
\nMake sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.
\nAnswer:
\nSilkworm \u279d Cocoon with pupa<\/p>\n

Question 7.
\nOut of the following, which are the two terms related to silk production? Sericulture, floriculture, moriculture, apiculture and silviculture.
\nAnswer:
\nHints:<\/p>\n

    \n
  1. Silk production involves cultivation of mulberry leaves and rearing silkworms. Sericulture<\/li>\n
  2. Scientific name of mulberry is Morns alba. Moriculture<\/li>\n<\/ol>\n

    Question 8.
    \nMatch the words of Column I with those given in Column II:<\/p>\n\n\n\n\n\n\n\n\n
    Column I<\/td>\nColumn II<\/td>\n<\/tr>\n
    1. Scouring<\/td>\n(a) Yields silk fibres<\/td>\n<\/tr>\n
    2. Mulberry leaves<\/td>\n(b) Wool yielding animal<\/td>\n<\/tr>\n
    3. Yak<\/td>\n(c) Food of silkworm<\/td>\n<\/tr>\n
    4. Cocoon<\/td>\n(d) Reeling<\/td>\n<\/tr>\n
    <\/td>\n(e) Cleaning sheared skin<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Answers:
    \n1 – e
    \n3 – c
    \n3 – b
    \n4 – a<\/p>\n

    Question 9.
    \nGiven below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
    \nDown
    \n(D) 1 : Thorough washing
    \n2 : Animal fibre
    \n3 : Long thread like structure<\/p>\n

    Across
    \n(A) 1 : Keeps warm
    \n2 : Its leaves are eaten by silkworms
    \n3 : Hatches from egg of moth
    \n\"KSEEB<\/p>\n

    Class 7 Science Fibre to Fabric Additional Important Questions and Answers<\/h3>\n

    Question 1.
    \nHow many types of fibres found in sheep?
    \nAnswer:
    \nThere are two types of fibres from sheep fleece.
    \nThey are<\/p>\n

      \n
    1. the coarse beard hair<\/li>\n
    2. the fine soft under-hair close to the skin.<\/li>\n<\/ol>\n

      Question 2.
      \nWhat are the sources of wool?
      \nAnswer:
      \nSeveral breeds of sheep are found in different parts of our country. Sheep wool is very common. Yak wool from Tibet and Ladakh Mohair is obtained from angora goats, wool from goat hair, The underfur of Kashmiri goats are soft and it is woven into fine shawls called Pashmina shawls. The fur on the body of camels is also used as wool. Llama and Alpaca found in South America also yield wool.<\/p>\n

      Question 3.
      \nWhat is meant by selective breeding?
      \nAnswer:
      \nThe process of selecting parents for obtaining special characters in their offspring such as soft under hair in sheep is termed as
      \nselective breeding.<\/p>\n

      Question 4.
      \nWhere and how the sheep are reasred in India?
      \nAnswer:
      \nIn Jammu and Kashmir, Himachal Pradesh, Uttaranchal, Arunachal Pradesh, Sikkim, the plains of Haryana, Punjab, Rajasthan, Gujarat etc., the shepherds taking their herds of sheep for grazing. Sheep are herbivores and prefer grass and leaves. Apart from grazing, reares also feed them on a mixture of pulses, com, Jowar, oil cakes, etc., In winter Sheep are kept indoors and fed on leaves grain and dry footder.<\/p>\n

      Question 5.
      \nDefine Shearing.
      \nAnswer:
      \nThe fleece of the sheep along with a thin layer of skin is removed from its body is known as shearing.<\/p>\n

      Question 6.
      \nWhat is meant by scouring?
      \nAnswer:
      \nThe sheared skin with hair is thoroughly washed in tanks to remove grease, dust and dirt is called scouring.<\/p>\n

      Question 7.
      \nWhat is sorting?
      \nAnswer:
      \nSorting is the process of separating the different textures of hair.<\/p>\n

      Question 8.
      \nDefine Sericulture.
      \nAnswer:
      \nThe rearing of silkworms for obtaining silk is called as sericulture.<\/p>\n

      Question 9.
      \nName some Indian breeds of sheep.
      \nAnswer:<\/p>\n\n\n\n\n\n\n\n\n\n
      Name of breed<\/td>\nQuality of wool<\/td>\nState where found<\/td>\n<\/tr>\n
      1. Lohi<\/td>\nGood quality wool<\/td>\nRajasthan, Punjab<\/td>\n<\/tr>\n
      2. Rampur bushair<\/td>\nBrown fleece<\/td>\nUttar Pradesh, Himachal Pradesh<\/td>\n<\/tr>\n
      3. Nali<\/td>\nCarpet wool<\/td>\nRajasthan, Haryana, Punjab<\/td>\n<\/tr>\n
      4. Bakharwal<\/td>\nFor woolen shawls<\/td>\nJammu and Kashmir<\/td>\n<\/tr>\n
      5. Marwari<\/td>\nCoarse wool<\/td>\nGujarat<\/td>\n<\/tr>\n
      6. Patanwadi<\/td>\nFor hosiery<\/td>\nGujarat<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Question 10.
      \nExplain the life-history of silk moth.
      \nAnswer:
      \nThe female silk moth lays eggs from which hatch larvae which are called Caterpillars or silkworms. They grow in size and when the caterpillar is ready and enter pupa stage. The caterpillar secretes fibre made of a protein, soon the caterpillar completely covers itself by silk fibres and turns into pupa. This covering is known as Cocoon. The further development of the pupa into moth continues inside the cocoon. The silk yarn (thread) is obtained from the cocoon of the silk moth.<\/p>\n

      Question 11.
      \nWhat are the various types of silk?
      \nAnswer:
      \nThe types of silks are mulberry silk, tassar, silk, eri silk, mooga silk etc.,<\/p>\n

      Question 12.
      \nExplain the processing of silk.
      \nAnswer:
      \nA pile of cocoons is used for obtaining silk fibres. The Cocoons are kept under the sun or boiled or exposed to steam. The silk fibres separate out. The process of taking out threads from the cocoon for use as silk is called reeling the silk. Reeling is done in special machines, which unwind the threads or fibres of silk from the cocoon. Silk fibres are then spun into silk threads, which are woven into silk cloth by weavers.<\/p>\n

      Question 13.
      \nDraw a neat diagram of the life-history of silk moth.
      \n\"KSEEB<\/p>\n

      II. Fill in the blanks :<\/span><\/p>\n

        \n
      1. Wool<\/u> is obtained from the fleece (hair) of sheep or Yak.<\/li>\n
      2. Parhmina shawls<\/u> are woven from the soft wool of Kashmiri goat<\/li>\n
      3. Yak wool is common in Tibet<\/u> and Ladakh<\/u><\/li>\n
      4. Mohair<\/u> is obtained from angora goats.<\/li>\n
      5. Llama<\/u> and Alpaca<\/u> found in South America.<\/li>\n
      6. The rearing of silkworms for obtaining silk is called Sericulture.<\/u><\/li>\n
      7. The soft silk yarn (thread) is as strong as the thread of steel.<\/u><\/li>\n
      8. The most common silk moth is the mulberry<\/u> silk moth.<\/li>\n
      9. Sericulture or Culture of silkworms is a very Old occupation<\/u> in India.<\/li>\n
      10. China<\/u> leads the world in silk production.<\/li>\n
      11. Sometimes the sorters get infected by the bacterium anthrax.<\/u><\/li>\n
      12. The risks faced by workers in any industry are called occupational<\/u> hazards.<\/li>\n
      13. The process of taking out threads from the cocoon is known as reeling the silk.<\/u><\/li>\n
      14. Silk fibre is chemically a Protein.<\/u><\/li>\n
      15. The scientific name of mulberry is Morus alba.<\/u><\/li>\n
      16. The small fluffy fibres of wool are called burrs.<\/u><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

        Students can Download Chapter 3 Fibre to Fabric Questions and Answers, Notes Pdf, KSEEB Solutions for Class 7 Science, Karnataka State Board Solutions help you to revise complete Syllabus and score more marks in your examinations. Karnataka State Syllabus Class 7 Science Chapter 3 Fibre to Fabric Class 7 Science Fibre to Fabric NCERT Textbook …<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts\/12451"}],"collection":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/comments?post=12451"}],"version-history":[{"count":0,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts\/12451\/revisions"}],"wp:attachment":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/media?parent=12451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/categories?post=12451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/tags?post=12451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}