scouring
sorting
Answer the following questions in brief
Name three animals whose fleece is used for making woollen fibre
2. Name three common varieties of wool.
3. Give the meaning of the term: 'sorting,
4. Define the term: 'sericulture!
$ How is silk fibre obtained from cocoon?
Name two countries in which silk is produced on a large scale,
6
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Answer the following questions.
How do woollen clothes keep us warm in winter?
Answers
ans1) Apart from sheep, wool also comes from the angora goat, yak, llama, alpaca, and even camels. All these animals have a thick coat of hair or fleece, which keeps them warm. Wool is obtained from this fleece. Shearing is the first step in processing fibre into wool.
ans2) Cashmere wool, angora wool, mohair wool and camel wool are some common variety of wool.
ans3) to put things into different groups or places, according to their type, etc.; to separate things of one type from others
ans4) the production of silk and the rearing of silkworms for this purpose.
ans5) Cocoons are collected and kept under the sun, or boiled, or exposed to steam. This helps in separating out the silk fibres. The process by which silk thread is separated from the cocoon is called reeling the silk. ... The silk threads obtained are woven into the desired clothes.
ans6) China
The two countries in which silk is produced on a large scale is China and India.
ans7) Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.