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Clothes are important because they guard our bodies against the external environment like insect bites, and they make us look good.

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Definition: 1 Mark
Production: 1 Mark
Examples: 1 Mark
A yarn is a long thread of interlocked fibres.
The fibres are first drawn out from their source and then twisted into yarn. This process is called spinning.
The devices used in spinning are takli and charkha.

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Reason: 1 Mark
Fibres + uses: 1Mark each
Syntheticfibresdon't burn but melt on exposure to fire.If they catch fire, they melt and stick to the body of the personwearingthem. This is why it isadvised not to wear clothesmade ofsynthetic fibrewhile workingin akitchenor in a laboratory.
Four synthetic fibres - rayon, nylon, Teflon, and acrylic
Rayon - It is usedfor making surgical dressings.
Nylon - It is used for making ropes.
Teflon - Itisusedas a non-stick coating for pans and other cookware.
Acrylic- It is used to make coloured plexiglass sheets.

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Each solution : 1 Mark
a) Cotton fibre is obtained from the fruit of the cotton plant.
b) Jute fibreis obtained from the stemof the plant.
c) Nylon, polyester, acrylic fibres areobtained from chemicals.

Answer: Option C. -> chemicals
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C
Synthetic fibres are prepared from chemicals in the laboratories. For example, Nylon

Answer: Option C. -> knitting
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C
Ginning is the process of obtaining cotton fibres from cotton bolls. The process of making yarn from fibres is called spinning.The process in which a single yarn is used to make a piece of fabric is called knitting. This is how sweaters are made. The process of arranging two sets of yarns together to make a fabric is called weaving.

Answer: Option A. -> plants and animals
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A
Natural fibres are obtained from plants and animals. For example, cotton is obtained from the seeds of cotton plant, wool is obtained from the hair of animals like yak, sheep, etc.
Synthetic fibres are obtained from different chemicals and petroleum products. For example, nylon, terylene, etc.

Answer: Option D. -> Takli
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D
Takli is a simple stick with a disc like attachment to prevent the spun thread from slipping. It is usually made from wood.
In English, the takli is called the spindle. It is used for spinning, twisting fibres such as wool, cotton and hemp to make yarn.

Answer: Option B. -> ginning
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B
Ginning is the process of removing coitton seeds from cotton pods. The image shown below depicts the process of ginning.

Answer: Option B. -> False
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B
Polyester is a man-made fibre as it is prepared in laboratories from chemicals. It is used in making ropes, nets, raincoats, jackets, etc. Natural fibres are sourced from plants or animals. For example, cotton is obtained from the fruits of cotton plants.