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Chemistry
3. Fibre to Fabric
Home · Class 7 · Chemistry · NCERT Science · 3. Fibre to Fabric
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Q3 of 16 Page 32

Which of the following does not yield wool?

(i) Yak (ii) Camel (iii) Goat (iv) Woolly dog.

Woolly dog does not yield wool. Wool comes from Yak, camel and goat. These wool-yielding animals bear hair on their body. Hair keeps these animals warm. Wool is derived from these hairy fibres.


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1

You must be familiar with the following nursery rhymes:

i. ‘Baa baa black sheep, have you any wool.’


ii. ‘Mary had a little lamb, whose fleece was white as snow.’


Answer the following:


a. Which parts of the black sheep have wool?


b. What is meant by the white fleece of the lamb?

2

The silkworm is (a) a caterpillar, (b) a larva. Choose the correct option.

(i). a (ii). b (iii) both a and b (iv) neither a nor b.

4

What is meant by the following terms?

(i) Rearing (ii) Shearing (iii) Sericulture

5

Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.


Shearing, ______, sorting, ______, ___________.

Questions · 16
3. Fibre to Fabric
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