NCERT Solution For Class 7 Science, Chapter 3 – Fibre to Fabric

NCERT Solutions for class 7 science chapter 3 is known as an extremely helpful resource for preparing for the exam. Takshila Learning provides its learners with access to a wealth of NCERT problems and their solutions. CBSE class 7 science chapter 3 Science fibre to fabric NCERT Solutions are built by subject matter experts, so be sure to train learners for a good grade. The questions set out in the NCERT fibre to fabric class 7

NCERT Solution For Class 7 Science, Chapter 3 – Fibre to Fabric provides us with all-inclusive information on all concepts. As students would have to learn the basics about the subject in fibre to fabric class 7, this curriculum for class 7 is comprehensive study material, which explains the concepts in a great way.

Exercise Questions

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?

Solution:

1. a) Wool is obtained from hairy fibres of the sheep.
2. b) White fleece of the lamb refers to the white colour of their fur.
3. 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.

Solution:

(iii) both a and b

3. Which of the following does not yield wool?

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

Solution:

The answer is (iv) Woolly dog

4.What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture

Solution:

1. i) Raising of domestic animals like sheep, goat, yak, cow and buffaloes for commercial purposes such as for milk and fur is known as rearing.
2. ii) Shearing is a process of removal of animal hair by using machines similar to those used by barbers.
3. ii) Rearing of silkworms to get silk is known as Sericulture.
4. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.

Shearing, __________, sorting, __________, __________, _________.

Solution:

Shearing, Scouring, sorting, picking of burrs, dying of fibres, making of yarn.

6. Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

Solution:

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

Solution:

Sericulture and moriculture

8. Match the words of Column I with those given in Column II:

Solution:

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 : Animal fibre

Across

(A) 1 : Keeps warm

2 : Its leaves are eaten by silkworms

3: Hatches from egg of moth

Solution:

Down:

1D. Scour

2D. Silk

3D. Fibre

Across

1A. Wool

2A. Mulberry

3A. Caterpillar

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