P4 Sajs Science Quiz - Conductor Of Heat

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1. Which of the following explains why cooking utensils are made of metal but the handles are made of plastic?

Explanation

The handle of the frying pan should be made of a poor conductor (plastic) of heat to prevent the user from getting burnt when handling it while the cooking utensils should be made of metal to allow the food to be cooked faster.

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P4 Sajs Science Quiz - Conductor Of Heat - Quiz

Science assessment for P4 SAJS pupils after they have viewed the Power point slides on Heat.

2. Which of the following consists of objects that are good conductors of heat?

Explanation

Iron wire, thumbtack and steel ruler are made from materials that are good conductors of heat.

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3. Which of the following are poor conductor(s) of heat?

A: Iron
B: Plastic
C: Rubber
D: Copper

Explanation

Iron and Copper are both good conductors of heat while Plastic and Rubber are poor conductors of heat.

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4. John set up the following experiment as shown below.




 




He used two similar test-tubes and thumbtacks for the above experiment. When the copper wire was heated for some time, Thumbtack A dropped off before Thumbtack B. What can we conclude from the experiment?

Explanation

Liquid X gains heat faster and transferred it to the glass. As a result Thumbtack A was able to drop off faster than thumbtack B.

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5. Calvin poured hot water into 4 different cups. The temperature of the water in the cups were taken at the beginning of the experiement and again after five minutes. The temperature readings are recorded in the tabel below.



  A B C D
Initial temperature 50 ºC 60 ºC 45 ºC 60 ºC
Temperature after 5 minutes 42 ºC 45 ºC 40 ºC 55 ºC

Explanation

Metal is a good conductor of heat. As a result, the difference in temperature should be the greatest as the cup will be able to conduct the heat of the water away quickly.

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Which of the following explains why cooking utensils are made of metal...
Which of the following consists of objects that are good conductors of...
Which of the following are poor conductor(s) of heat?A: IronB:...
John set up the following experiment as shown below. He used two...
Calvin poured hot water into 4 different cups. The temperature of the...
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