Statement 1: Fleece keeps the animal warm because it traps air between its fibres.

Statement 2: Air is a bad conductor of heat.

Both the statements are correct.

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Only statement 1 is correct.

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Only statement 2 is correct.

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Both the statements are incorrect.

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Solution

The correct option is D Both the statements are incorrect.
Wool is a bad conductor of heat. It traps air between its fibres. This trapped air does not allow heat to pass from our body into the surrounding, thereby keeping us warm. Hence, we should wear woolen clothes in winter.

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Question 2

A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because:

(a) Friction between the layers of newspaper produces heat

(b) Air trapped between the layers of newspaper is a bad conductor of heat.

(d) Newspaper is at a higher temperature than the temperature of the surrounding.

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