Class 7 Science Chapter 3 Fibre to Fabric

Last updated on August 30th, 2023 at 01:01 am

Fibre to Fabric Class 7 Questions and Answers – Fibre to Fabric Class 7 Notes

Fibre to Fabric Class 7 Questions and Answers for students of Cbse / Icse Board

 

Q1 : You must be familiar with the following nursery rhymes:

• ‘Baa baa black sheep, have you any wool.’
• ‘Mary had a little lamb, whose fleece was white as snow.’ 

Answer the following:

1. Which parts of the black sheep have wool?
2. What is meant by the white fleece of the lamb?

Answer :

1. Wool is obtained from the hair of the sheep.
2. White fleece of the lamb refers to the white coloured hair of the lamb.

 

Q2 : The silkworm is (a) a caterpillar, (b) a larva. Choose the correct option.

• a
• b
• both a and b
• neither a nor b

Answer :

both a and b

 

Q3 : Which of the following does not yield wool?

• Yak
• Camel
• Goat
• Woolly dog

Answer : Woolly dog

 

Q4 : What is meant by the following terms?

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

Answer :

1. Rearing is the process of raising, feeding, reproducing, and caring for useful animals.
2. Shearing is the process of removing the sheep’s hair as well as a thin layer of skin.
3. Sericulture is the practice of raising silkworms for the purpose of producing silk.

 

Q5 : 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,
• picking of burrs,
• dying of fibres,
• making of yarn

 

Q7:Out of the following, which are the two terms related to silk production?

Sericulture, floriculture, moriculture, apiculture and silviculture

Hints: Silk production involves cultivation of mulberry leaves and rearing silkworms.

• Scientific name of mulberry is Morus alba.

Answer : Sericulture and moriculture

 

Q8 : Match the words of Column I with those given in Column II

Column I	Column II
(i) Scouring	(a) Yields silk fibres
(ii) Mulberry leaves	(b) Wool yielding animal
(iii) Yak	(c) Food of silk worm
(iv) Cocoon	(d) Reeling
	(e) Cleaning sheared skin

Answers :- 1 – e  ,  2 – c , 3 – b , 4 – a

• Class 7 Science Chapter 2 Nutrition in Animals
• Class 7 Science Chapter 1 Nutrition in Plants

 

Class 7 Science Fiber to Fabric Extra Questions

 

Q. How many types of fibers are there?

There are 2 types of fibers

• Natural fibers
• Manmade fibers

 

 Q. What is natural fibers?

Natural fibers are obtained from plants and animals; such as jute, cotton, wool, silk, etc. Natural fibers can be classified into two types: Plant fiber and Animal fiber.