NCERT Grade 7-Fibre to Fabric-Questions

NCERT Solutions for Class 7 Science

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Fibre to Fabric

1.     You must be familiar with the following nursery rhymes:

(i) ‘Baa baa black ship, have you any wool.’

(ii) ‘Mary had a little lamb, whose fleece was white as snow.’ 

Answers the following:

(a) Which parts of the black sheep have wool?

(b) What is meant by the white fleece of the lamb?

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.

3.    Which of the following does not yield wool?

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

4.    What is meant by the following terms?

(i) Rearing      (ii) Shearing        (iii) Sericulture

5.    Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.

Shearing, ————— , sorting, ————–, —————–.

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

7.    Out of the following, which are the two related to the production of silk.

Sericulture, Floriculture, Moricuiture, Apiculture and Silviculture.

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

Column I                                Column II

1. Scouring                             (a) Yields silk fibres

2. Mulberry leaves               (b) Wool yielding animal

3. Yak                                      (c) Food of animal

4. Cocoon                               (d) Reeling

   (e) Cleaning sheared skin.

9.    Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank space with letters that complete the words.

Down                                                        Across

1. Thorough washing                             1. Keeps warm.

2. Animal fibre                                        2. Its leaves are eaten by silk worms.

3. Long thread like                                 3. Hatches from egg of both structures.

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