NCERT Class VII Science Solution: Chapter 3-Fibre to Fabric Part 3

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Question 5:

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

Answer:

Shearing, scouring, sorting, fibre spinning, fibre drying, rolling in silk yarn.

Images for Sequence of steps in the processing of wool

Sequence of Steps in the Processing of Wool

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Question 6:

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

Answer:

Diagram shows a life cycle of a silkworm moth

Life Cycle of a Silkworm Moth

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Question 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.

Answer:

Sericulture and moriculture.

Question 8:

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

Match column 1 and column 2 (Q)

Column I

Column II

1. Scouring

(a) Yields silk fibres

2. Mulberry leaves

(b) Wool yielding animal

3. Yak

(c) Food of silk worm

4. Cocoon

(d) Reeling

(e) Cleaning sheared skin

Answer:

Match column 1 and column 2 (Ans)

Column I

Column II

1. Scouring

(e) Cleaning sheared skin

2. Mulberry leaves

(c) Food of silk worm

3. Yak

(b) Wool yielding animal

4. Cocoon

(a) Yields silk fibres

Question 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

This image shows crossword puzzle

Crossword Puzzle

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Answer:

Diagram shows crossword puzzle based on fiber to fabric

Crossword Puzzle Based on Fiber to Fabric

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