Question

4. A beggar wrapped himself with a few layer of newspaper on a cold winter night. This helped hin
keep himself warm because:
a) friction between the layer of newspaper produce heat.

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

c) newspaper is a conductor of heat.

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

5. The excretory substance in fishes is:
a) Urea
b) Ammonia
c) Uric acid
d) None of these​

Answer 1

Answer:

4. b) Air trapped between the layer of newspaper is a bad conductor of heat thus not allowing body heat to escape

5. b) Ammonia

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Answer 2

Answer:

Q 4 b) air trapped between the layers of newspaper is a bad conductor of heat.

Q 5 a) urea