Sometimes three to four silk fibres are twisted into a strand for weaving to prevent silk yarn from splitting into divided fibres. This process is called throwing.

Column A Column B A. Silkmoth 1. Silk fibre B. Cocoon 2. Removal of a thick coat of hair C. Food for silk moth 3. Bombyx mori D. Fleece 4. Inferior quality of silk E. Shearing 5. Mulberry leaves F. Nail silk 6. Hair of sheep

A - 3 Bombyx mori, the domestic silk moth, is an insect from the moth family Bombycidae. B - 1 Cocoon produces silk fibre. C - 5 The only nutrition silkworm get is through mulberry leaves. D - 6 The woolly covering of a sheep or goat is called fleece. E - 2 Sheep shearing is the process by which the woollen fleece of a sheep is cut off. F - 4 Inferior quality of silk is called nail silk because it is not as appealing as mulberry silk. Thus, the final answer is : Column A Column B A. Silk moth 3. Bombyx mori B. Cocoon 1. Silk fibre C. Food for silk moth 5. Mulberry leaves D. Fleece 6. Hair of sheep E. Shearing 2. Removal of a thick coat of hair F. Nail silk 4. Inferior quality of silk

E M B I B E

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

MEDIUM

7th CBSE

IMPORTANT

Earn 100

What are animal fibres? Give two examples.

Important Questions on Materials of Daily Use

EASY

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

How does wool fibre keep our body warm?

EASY

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

What are the three grades of silk produced?

MEDIUM

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

What is throwing?

EASY

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Name a few varieties of silk.

EASY

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q B

Name two breeds of sheep found in India. Also, give the names of the states in which they are found.

HARD

7th CBSE

IMPORTANT

Start Up Science 7>Chapter 3 - Materials of Daily Use>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C

Column A	Column B
A. Silkmoth	1. Silk fibre
B. Cocoon	2. Removal of a thick coat of hair
C. Food for silk moth	3. Bombyx mori
D. Fleece	4. Inferior quality of silk
E. Shearing	5. Mulberry leaves
F. Nail silk	6. Hair of sheep