Hair trap a lot of air, which is a poor conductor of heat.
Question
How do the hair of certain animals help in keeping their bodies warm?
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Paheli went to the market to buy sarees for her mother. She took out a thread from the edge of the two sarees shown by the shopkeeper and burnt them. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one from a pure silk saree? Give reason for your answer.
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