Chapter 3
Fibre To Fabric
Here is some important points and answer of chapter 3 Fibre To Fabric NCERT science of class 7 which helps students to better understand topics of chapter 3 Fabric to Fibre.
Keywords:-
a) Cocoon:- Caterpillar of silkmoth turn in pupa and covered themself in a outer covering made by protein that outer cover is known as cocoon.
b)Fleece:-Hairs of wool yeilding animals are known as fleece.
c) Reeling:- Converting of hairs or silk in thread and roll them is known as reeling.
d) Scouring:- Washing or remaining dust particles from removed hairs of animals is called scouring.
e) Sericulture:- Rearing of silkmoth for getting silk is known as sericulture.
f)Silk moth:- Bee like insects which provide silk are called silk moth.
g) Shearing:- Removing of hairs of wool yielding animals is known as shearing.
h)Silk worm:- Larva of a silk moth is also known as silk worm.
i)Sorting:- Seperating of wood fibre according to their texture is known as sorting.
j)Rearing:- Keeping animals and provide protection and nutrition to them is known as rearing.
These are the important keynotes of Chapter 3 Fibre to Fabric
Here is the Solution Of textbook CHAPTER 3
fibre to fabric.
Exercise Questions-
Ques 1. You must be familiar with the following nursery rhymes:
i)'Baa baa black sheep, 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) hairs
b) white hairs
Ques 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. iv)neither a nor b
Ques 3. Which of the following does not yield wool?
i) yak (ii)camel. (iii)Goat. (iv)Willy dog
Ans. Wolly dog.
Ques 4. What is meant by the following terms?
i) Rearing:- keeping animals and provide protection and nutrition to them is known as rearing.
ii) Shearing:- Removing of hairs of wool yielding animals is known as shearing.
iii) Sericulture:- Rearing of silkmoth for getting silk is known as sericulture.
Ques 5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.
Shearing,________,sorting, ________, _______, ________.
Ans. Shearing, souring, sorting, carding, dyeing, spining.
Ques 6. Make sketches of the two factors in the life history of the silk moth which are directly related to the production of silk.
Ans.
Ques 7. Out of the following which are the two terms related to silk production?
Sericulture, floriculture, moriculture, apiculture, and silviculture.
Hints: i) silk production involves cultivation of mulberry leaves and rearing silkworms.
ii) Scientific name of mulberry is Morus alba.
Ans. i) Sericulture
ii) Moriculture
Ques 8.Match the words of Column I with those given in Column II.
Column I. Column II
i)Scouring. (a)Yields silk fibres
ii) Mulberry. (b)wool yielding animal
iii)Yak (c)food of silk worm
iv)Coccon (d) Reeling
(e)cleaning sheared skin
Ans. i)cleaning sheared skin
ii) food of silk worm
iii)wool yielding animal
iv) yields silk fibres.
Ques 9. Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
Down
(D) 1: Thorough washing.
2:Animal fibre.
3:Long thread like structure.
Across
(A) 1:Keeps warm.
2:Its leaves are eaten by silkworms.
3:Hatches from egg of moth.
Ans. Down
D) 1) thorogh washing Souring.
2) Animal fibre Silk and wool.
3) Long thread like structureFibre.
Across
A)1. Keeps warm Wool.
2) Its leaves are eaten by Silkworm Mulberry.
3) Hatches from egg moth Catterpillar.
This is the complete solution and explaination of Chapter 3 FIBRE TOFABRIC of Class 7 Science NCERT.
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