NCERT Solutions for Class 7 Science Chapter 3: Fibre to Fabric

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NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric are provided in this article. The important topics that are included in this chapter are:

Wool
Silk

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NCERT Solutions for Class 7 Science Chapter 3

NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric are given below:

NCERT Solution

Class 7 Science Chapter 3 Fibre to Fabric: Important Topics

Fibres are thin, long, flexible, and hair or thread-like structures. The fibres are usually obtained from two main sources- Plants and Animals. These fibers are called Natural Fibres. Cotton, wool, and silk are examples of Natural Fibres.

Wool

Wool is referred to as the textile fibre obtained from sheep and other animals, which includes cashmere and mohair from goats, qiviut from muskoxen, hide and fur clothing from bison, angora from rabbits, and other types of wool from camelids.

Silk

Silk is a natural protein fibre, some forms of which can be woven into textiles. The protein fibre of silk is formed mainly of fibroin, which is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity.

Chapter Related Links:

MCQs on fibre to fabric	MCQs on animal kingdom	Variety in Fabrics
Yarn to Fabric	History of Clothing Material	Animal Fibre
Silkworm	Spinning of cotton yarn	Synthetic Fibre
Fibrous Materials Uses	Jute	Plant Fibers

Class 7 Science Additional Resources:

CBSE Class 7 Science NCERT Textbook	CBSE Class 7 Science Sample Paper	NCERT Solutions

CBSE X Related Questions

1.
Out of the two media - Medium 1 and Medium 2, in which is the speed of light more?
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2.
In our houses we receive A.C. electric power of 220 V. In electric iron or electric heater cables having three wires with insulation of three different colours – red, black and green are used to draw current from the mains. What are these three different wires called? Name them colourwise. What is the potential difference between the red wire and the black wire? What is the role of the wire with green insulation in case of accidental leakage of electric current to the metallic body of an electrical appliance?
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The minimum number of identical bulbs of rating 4V, 6W, that can work safely with desired brightness, when connected in series with a 240V mains supply is:
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- 40
- 60
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View Solution
6.
Consider the following food chain:
Grass \( \rightarrow \) Grasshopper \( \rightarrow \) Frog \( \rightarrow \) Snake \( \rightarrow \) Eagle
If the amount of energy available at third trophic level is 50 kJ, the available energy at the producer level was:
- 0.5 kJ
- 5 kJ
- 500 kJ
- 5000 kJ
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NCERT Solutions for Class 7 Science Chapter 3: Fibre to Fabric

NCERT Solutions for Class 7 Science Chapter 3

Class 7 Science Chapter 3 Fibre to Fabric: Important Topics

Wool

Silk

CBSE X Related Questions

1.
Out of the two media - Medium 1 and Medium 2, in which is the speed of light more?

3.
The sky appears dark to passengers flying at very high altitude

4.
What is a rainbow? 'We see a rainbow in the sky only after the rainfall.' Why?

5.
The minimum number of identical bulbs of rating 4V, 6W, that can work safely with desired brightness, when connected in series with a 240V mains supply is:

6.
Consider the following food chain:
Grass \( \rightarrow \) Grasshopper \( \rightarrow \) Frog \( \rightarrow \) Snake \( \rightarrow \) Eagle
If the amount of energy available at third trophic level is 50 kJ, the available energy at the producer level was:

Comments

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NCERT Solutions for Class 7 Science Chapter 3: Fibre to Fabric

NCERT Solutions for Class 7 Science Chapter 3

Class 7 Science Chapter 3 Fibre to Fabric: Important Topics

Wool

Silk

CBSE X Related Questions

1.Out of the two media - Medium 1 and Medium 2, in which is the speed of light more?

3.The sky appears dark to passengers flying at very high altitude

4.What is a rainbow? 'We see a rainbow in the sky only after the rainfall.' Why?

5.The minimum number of identical bulbs of rating 4V, 6W, that can work safely with desired brightness, when connected in series with a 240V mains supply is:

6.Consider the following food chain: Grass \( \rightarrow \) Grasshopper \( \rightarrow \) Frog \( \rightarrow \) Snake \( \rightarrow \) Eagle If the amount of energy available at third trophic level is 50 kJ, the available energy at the producer level was:

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Out of the two media - Medium 1 and Medium 2, in which is the speed of light more?

3.
The sky appears dark to passengers flying at very high altitude

4.
What is a rainbow? 'We see a rainbow in the sky only after the rainfall.' Why?

5.
The minimum number of identical bulbs of rating 4V, 6W, that can work safely with desired brightness, when connected in series with a 240V mains supply is:

6.
Consider the following food chain:
Grass \( \rightarrow \) Grasshopper \( \rightarrow \) Frog \( \rightarrow \) Snake \( \rightarrow \) Eagle
If the amount of energy available at third trophic level is 50 kJ, the available energy at the producer level was: