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Our CBSE Notes for Notes 3. Fibre to Fabric - Natural Fibres and Synthetic Fibres | Class 7 Science - Toppers Study is the best material for English Medium students cbse board and other state boards students.

 

Notes ⇒ Class 7th ⇒ Science ⇒ 3. Fibre to Fabric

Notes 3. Fibre to Fabric - Natural Fibres and Synthetic Fibres | Class 7 Science - Toppers Study

Topper Study classes prepares CBSE Notes on practical base problems and comes out with the best result that helps the students and teachers as well as tutors and so many ecademic coaching classes that they need in practical life. Our CBSE Notes for Notes 3. Fibre to Fabric - Natural Fibres and Synthetic Fibres | Class 7 Science - Toppers Study is the best material for English Medium students cbse board and other state boards students.

3. Fibre to Fabric

| Natural Fibres and Synthetic Fibres |

Notes 3. Fibre to Fabric - Natural Fibres and Synthetic Fibres | Class 7 Science - Toppers Study


1. Natural fibres : The fibres which are obtained from plants and animals are called natural fibres. 

Examples of natural fibres: 

(i) Fibres obtained from plants : Cottons, Jute etc.

(ii) Fibres obtained from animals : Wool and silk.

2. Synthetic Fibres : Nylon, polyesters, Acrilyc etc. 

Obtaining Wool: Wool is obtained from the fleece (hair) of sheep or yak.

Obtaining Silk : Silk fibres come from cocoons of the silk moth.

Animals by which obtain wool : Wool comes from sheep, goat, yak and some other animals.

The hairy skin of the sheep has two types of fibres that form its fleece:

(i) the coarse beard hair, and
(ii) the fine soft under-hair close to the skin.

Selective breeding:

The process of selecting parents for obtaining special characters in their offspring, such a soft under hair in the sheep, is ‘termed selective’.

  • sheep wool and Yak wool is common in Tibet and Ladakh.
  • Angora wool is obtained from angora goats, Found in hilly regions such as Jammu and Kashmir.
  • The fur (hair) on the body of camels is also used as wool. Llama and Alpaca, found in South America, also yield wool.

Pashmina shawls : Wool is also obtained from goat hair. The under fur of Kashmiri goat is soft. It is woven into fine shawls called Pashmina shawls.

Name of Animals which yield wool :

(i) Angora goat

(ii) Goat

(iii) Sheep 

(iv) Camel 

(v) yak 

(vi)  Llama 

(vii) Alpaca 

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