Class 7 NCERT Solutions Science Chapter 3 - Fibre to Fabric
32
33
Fibre to Fabric Exercise 32
Solution 1
(a) Wool is obtained from the hairy fibres (hair) of the sheep.
(b) White fleece of the lamb refers to the white coloured hair of the lamb
(b) White fleece of the lamb refers to the white coloured hair of the lamb
Solution 2
(iii) both a and b
Concept insight: Caterpillar is the larva of silkworm.
Solution 3
(iv) Woolly dog
Solution 4
(i) Rearing: Rearing is raising livestock like goat, cows, sheep etc for commercial purpose by taking them out in herds for grazing , feeding them on a mixture of pulses, corn, jowar, oil cakes (material left after taking out oil from seeds) and minerals for better growth and yield of produce like meat, milk, wool.
(ii) Shearing: It is the process of removal of fleece along with a thin layer of skin from the body of sheep.
(ii) Sericulture: Sericulture refers to the rearing of silkworms to obtain silk.
(ii) Shearing: It is the process of removal of fleece along with a thin layer of skin from the body of sheep.
(ii) Sericulture: Sericulture refers to the rearing of silkworms to obtain silk.
Solution 5
Shearing, __scouring__, sorting, __picking of burrs__, __dyeing of fibres__, making of yarn.
Solution 6
Solution 7
Sericulture and moriculture
Solution 8
|
|
Column I |
|
Column II |
|
(i) |
Scouring |
(e) |
Cleaning sheared skin |
|
(ii) |
Mulberry leaves |
(c) |
Food of silk worm |
|
(iii) |
Yak |
(b) |
Wool yielding animal |
|
(iv) |
Cocoon |
(a) |
Yields silk fibres |
Fibre to Fabric Exercise 33
Solution 9
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