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| In your jotter write the DATE in the margin. Now add a TITLE for your homework. Your title should be the name of the Homework: Heat Homework Wk 3 |
Question 1.
A metal rod covered in wax was set up in an experiment as shown in the diagram below. The end of the rod was heated as shown. What will the wax look like after a few minutes?
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Question 2.
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| Which of the following list would be the best conductor of heat? | ||
| A. | wood | |
| B. | glass | |
| C. | metal | |
| D. | plastic | |
Question 3.
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| Which of the following list is a poor conductor of heat? | ||
| A. | air | |
| B. | iron | |
| C. | copper | |
| D. | aluminium | |
Question 4.
1. Isabel stirs her tea with a metal spoon. She chats for a minute to Tricia who stirs her tea with a plastic
spoon. Isabel finds that her spoon is hot to the touch while Tricia’s is still cool.
a) Describe how the heat travelled through the metal spoon. Explain your answer in terms of the
particles of the metal.
b) Why did Tricia’s spoon stay cool?
c) Copy the tables below into your jotter and complete it to show the uses of conductors and insulators in the home.
Question 5.
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The diagram below shows an experiment into heat transfer.
a) From the results what is rod X made from; iron, glass or copper? Question 6.2. Explain what is meant by a convection current. Question 7.
Question 8.
Question 9.
Question 10.Give three uses of convection currents. Question 11.
The heating element in a kettle is at the bottom. Use your knowledge of convection to explain why this is the best place to put it. Question 12.The drawing below shows a hot water immersion heater.
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a) Where would the hottest water be found, location A, B , C or D?
b) Explain your answer.
