Science Chapter-03: Fibre to Fabric

  • Is silkworm a larva or a caterpillar? Or both?

Ans. Both

  1. From the following animals, choose the one not suitable for wool extraction.

1- Goat

2-Camel

3- Yak

4- Wooly Dog

Ans. Wooly Dog

 

  1. Write a short note on the following.

(a) Rearing (b) Shearing (c) Sericulture

Ans.

(a) Rearing: It is a process of breeding, feeding and providing medical care to useful animals. These animals are kept since they produce one or more useful products for the human beings.

(b) Shearing: It is the process of removing fleece from the sheep along with a thin layer of skin.

(c) Sericulture: It is the rearing of silkworms to obtain silk is known as sericulture.

 

  1. Draw a sketch of the 2 stages involved in the life history of a silk moth which is directly involved in the production of silk.

Ans.

  1. In the following, identify the 2 terms related to silk production:

Sericulture, floriculture apiculture, moriculture, and silviculture.

Ans. Sericulture, Moriculture.

  1. Match the following
Column I Column II
1. Scouring

2. Mulberry Leaves

3. Yak

4. Cocoon

 (a) Yields silk fiber

(b) Wool yielding animal

(c) Food of silkworm

(d) Reeling

(e) Cleaning sheared skin

 

Ans.

Column I Column II
1. Scouring

2. Mulberry Leaves

3. Yak

4. Cocoon

 (e) Cleaning sheared skin

(c) Food of silkworm

(b) Wool yielding animal

(a) Yields silk fiber

 

  1. The below crossword puzzle is from this chapter. Use the hints.

 

  1. You must be familiar with the following rhymes:

(a) ’Baa baa black sheep, have you any wool.’

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

Answer the following:

(i) Which part of the black sheep has wool?

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

Ans:

(i) Black sheep has wool on its hairy skin called fleece.

(ii) White fleece of the lamb refers to the white colored hairy skin.

 

  1. Fill the missing steps in the sequence of steps involved in silk processing.

Shearing, _______, Sorting, _______, ________.

Ans. Shearing, scouring, sorting, picking out of burrs, colouring. rolling.