Class 6 NCERT Solutions Science Chapter 3 - Fibre to Fabric
24
Fibre to Fabric Exercise 24
Solution 1
There are two types of fibres :
a.Natural fibres: Fibres obtained from natural sources like plants and animals. Example-silk, wool.
b.Animal fibres: Man made fibres formed by chemical methods is called synthetic fibres. Example-rayon, nylon.
Wool and silk are obtained from animals and cotton and jute are obtained from plants. Hence, they are natural fibres. Nylon and polyester on the other hand are prepared artificially and are therefore synthetic fibres.
a.Natural fibres: Fibres obtained from natural sources like plants and animals. Example-silk, wool.
b.Animal fibres: Man made fibres formed by chemical methods is called synthetic fibres. Example-rayon, nylon.
Wool and silk are obtained from animals and cotton and jute are obtained from plants. Hence, they are natural fibres. Nylon and polyester on the other hand are prepared artificially and are therefore synthetic fibres.
Solution 2
a) Yarn is made from fibre. (True)
b) Spinning is a process of making fibres. (False)
Concept insight: Process of making yarn from fibres is called spinning.
c) Jute is an outer covering of coconut. (False)
Concept insight: Jute is obtained from the stem of Jute plant.
d) The process of removing seeds from cotton is called ginning. (True)
e) Weaving of yarn makes a piece of fabric. (True)
f) Silk fibre is obtained from the stem of a plant. (False)
Concept insight: Silk fibre is obtained from cocoon of a silk moth.
g) Polyester is a natural fibre. (False)
Concept insight: Polyester is a synthetic fibre.
b) Spinning is a process of making fibres. (False)
Concept insight: Process of making yarn from fibres is called spinning.
c) Jute is an outer covering of coconut. (False)
Concept insight: Jute is obtained from the stem of Jute plant.
d) The process of removing seeds from cotton is called ginning. (True)
e) Weaving of yarn makes a piece of fabric. (True)
f) Silk fibre is obtained from the stem of a plant. (False)
Concept insight: Silk fibre is obtained from cocoon of a silk moth.
g) Polyester is a natural fibre. (False)
Concept insight: Polyester is a synthetic fibre.
Solution 3
(a) Fruits and stems.
(b) Wool and silk.
(b) Wool and silk.
Solution 4
Fruit of cotton is used to obtain cotton fibre and jute is obtained from the stem of Jute plant.
Solution 5
Two items that are made from coconut fibre are:
(i) Ropes
(ii) Baskets
(i) Ropes
(ii) Baskets
Solution 6
The process of making yarn from fibre is called spinning. The fibres are first drawn out from their source and then twisted into yarn. Two devices used in spinning are takli and charkha.
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