NCERT Class VII Science Solution: Chapter 3-Fibre to Fabric Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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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

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

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 IColumn 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 IColumn 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

Answer:

Diagram Shows Crossword Puzzle Based on Fiber to Fabric

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