• Wool comes from sheep, goat, yak and some other animals.
• These wool-yielding animals bear hair on their body.
• The hair keeps them warm.
• Wool is obtained from the fleece i.e. hair of sheep or yak.
• The hairy skin of the sheep has two types of fibres that form its fleece:
  (i) the coarse beard hair, and
  (ii) the fine soft under-hair close to the skin.
• Some breeds of sheep possess only fine soft under-hair and used to develop good quality wool.
• The soft fine under-hair breed are chosen as parents to give birth to sheep which have only soft under hair.This process is called as "selective breeding".

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?

Ans: (a) The fleece (hair) of black sheep contains wool.
(b) It means white hair on the skin 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.

Ans: (iii) both a and b

3.Which of the following does not yield wool?
(i) Yak (ii) Camel (iii) Goat (iv) Woolly dog

Ans:(iv) Woolly dog

4.What is meant by the following terms?

Ans:
(i) Rearing: Taking care of useful animals by giving them shelter, good food, medical care is called as rearing.
(ii) Shearing: The fleece i.e hair of the sheep along with a thin layer of skin is removed from its body.This process is called shearing.
(iii)Sericulture:The rearing of silkworms for obtaining silk is called sericulture.

5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.
Shearing, __________, sorting, __________, __________.

Ans:
Shearing, scouring, sorting, picking burrs, colouring, rolling.