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Heat

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6-7 periods



Heat



Activity 1

Take a rod or flat strip of a metal, say of aluminium or iron. Fix a few small wax pieces on the rod. These pieces should be at nearly equal distances. Clamp the rod to a stand. If you do not find a stand, you can put one end of the rod in between bricks. Now, heat the other end of the rod and observe.

Which point will begin to melt first? Give your reasons.

Activity 2:

Heat water in a small pan or a beaker. Collect some articles such as a steel spoon, plastic scale, pencil and divider. Dip one end of each of these articles in hot water. Wait for a few minutes. Touch the other end. Enter your observation. Give reasons for your answer.

Article Material with which the article is made of Does the other end get hot Yes/No

conduction is transfer of heat : direct contact:: convection is transfer of heat: ______:: radiation is transfer of energy : ______
Accurate, Clearly explained, Complete, Knowledgeable, Precise



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