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Iv. answer the following questions:
1. a bag of cement lying in the open gets wet due to rain during the night. the next day the
sun shines brightly. do you think the changes, which have occurred in the cement could be
reversed? explain.
(2, a potter working on his wheel shaped a lump of clay into a pot. he then baked the pot in
an oven. do these two acts lead to the same kind of changes? justify your answer.
3) give three applications of heating and cooling in materials.
4) plastic do not conduct heat as well as iron. give reason
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Answers: 1
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Iv. answer the following questions:
1. a bag of cement lying in the open gets wet due to rain...
1. a bag of cement lying in the open gets wet due to rain...
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