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Reason: 2 Marks
Naming: 1 Mark
We should not wear synthetic fibreswhile working near fire because the fabric made out of synthetic fibresmelt and stick to the body of the person wearing it in case the clothes catch fire.
Three fabrics which are safe to be worn while working near fire are:

• Cotton


• Linen


• Wool

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Explanation: 1 Mark each
a) Regenerated fibres: Thesefibres are made from extremely small cotton fibres or any other fibre source such as wood pulp, milk protein, etc. Chemicals are used to dissolve these and the solution is then converted into solid fibres. Examples are rayon, casein fibre (from milk) and soya bean fibre.
b) While obtaining silk from cocoon, firstly cocoons are boiled and then silk fibres areseparated out,using machines. Machine unwinds the silk thread from cocoons. This process by which silk fibre is obtained is called reeling of silk.

:
Definition: 1 Mark each
Explanation: 1 Mark
The rearing of silkworms for the production of raw silk or the breeding and raising of silkworms for the production of silk economically is known as sericulture.
Moriculture is defined as the science of mulberry cultivation for silk production because the silkworm feeds on mulberry leaves.
Yes, a silkworm is a larva and a larva is a caterpillar as well.

Answer: Option D. -> Sheep, goat and yak
:
D
Wool and silk fibres are obtained from animals. Wool can be obtained from sheep, angora goat, yak, llama, alpaca, and even camels. Silk is obtained from cocoons of silkworm.

Answer: Option A. -> reeling
:
A
The process of taking out threads from the cocoon for obtaining silk is called reeling of silk. Reeling is done in special machines, which unwind the threads or fibres of silk from the cocoon after boiling the cocoons.

Answer: Option A. -> fleece of sheep
:
A
Wool is an animal fibre obtained from the fleece of animals like sheep, goats, camels, alpacas, llamas and yaks.
Silk is also an animal fibre. It is obtained from the cocoons of silkworms.
However, jute and cotton are plant fibres. Jute is obtained from the stem of the jute plant while cotton is obtained from the seeds of cotton plants.

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Naming animals: 0.5 Mark each
Wool comes from sheep, angoragoat, yak, llama, alpaca and camels.
All these animals have a thick coat of hair or fleece, which keeps them warm. Wool is obtained from thisfleece.
Sheep wool is more commonly available in India. In Tibet and Ladakh, yak wool is more common, whereas, in Jammu and Kashmir, it is the angora wool. The famous pashmina shawls come from the soft underfur of the Kashmiri goat.

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Each part: 1 Mark
Nylon is usually usedfor making parachutes and ropes for rock climbing.
This is because itis very strong and can withstand high load.
Nylon is a synthetic fibre.

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All hazards: 3 Marks
Workers in the wool industry face occupational hazard by inhaling anthracis bacillus. This got a nickname as a wool sorter’s disease because it infects people who sorted wool. Inactive anthrax spores live naturally in soil and are carried in the wool of sheep.
Many people suffer from pneumonia, blood infection, and even death.

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History of clothing: 1 Mark each
Indian clothes: 1 Mark
1. In the beginning of civilization, people used barks, leaves and animal fur as clothes.
2. When people settleddown as farmers, they used woven vines and animal fleece as clothes.
3. In the next stage, flax and cotton were woven into clothes.In those times, people just draped the fabric to cover themselves.
4. People started wearing stitched clothes only after the needle was invented.
Some signature clothing items of India include turbans, saris, and dhotis.