CBSE Class VII Science Solutions

Displaying 5 out of 21 questions & answers.
Q1.

Multiple choice question:

  1. Identify the animal that does not yield wool.
    1. elephant
    2. camel
    3. sheep
    4. goat
  2. Choosing parent sheep to produce offspring with desired qualities is called ________.
    1. sericulture
    2. scouring
    3. selective breeding
    4. selective shearing
  3. Mohair is a lustrous fibre obtained from _______________.
    1. alpacas
    2. angora goats
    3. angora rabbits
    4. silkworms
  4. Silk fibre is obtained from the ________________.
    1. larva
    2. egg
    3. cocoon
    4. adult moth
  5. Silk production involves the cultivation of _________________.
    1. blackberry bushes
    2. mulberry trees
    3. gooseberry trees
    4. strawberry plants
  6. The process in which silk thread is pulled out as a single fibre is called __________.
    1. sericulture
    2. carding
    3. spinning
    4. reeling
  7. Which of the following is not a variety of silk?
    1. merino
    2. tassar
    3. eri
    4. muga
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  1. (a) elephant
  2. (c) Selective Breeding
  3. (b) Angora goat
  4. (c) cocoon
  5. (b) mulberry trees
  6. (d) reeling
  7. (a) merino
Q2.

Name three animals other than sheep that yield wool.

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Answer:
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Angora rabbits, angora goats, and camels are the three animals other than sheep that yield wool.

Q3.

Match the words in column A with those in column B.

Column AColumn B
i. Nylona. Cocoon
ii. Musk oxb. Sorter's disease
iii. Anthraxc. Artificial fibre
iv. Pupad. West Bengal
v. Tassare. Qiviut

 

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  1. (c) Artificial fibre
  2. (e) Qiviut
  3. (b) Sorter's disease
  4. (a) Cocoon
  5. (d) West Bengal
Q4.

The pictures show the stages in wool processing. Label them and number them in the correct order.

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Q5.

Why do we wear woolen clothes in winter?

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