1. Which of the following materials is a good conductor of heat and electricity?
1
A. aluminum casserole
B. pot holder
C. plastic tray
D. wooden spoon

2. Why are electrical wires usually made of copper?

A. It is shiny.
B. It conducts electricity.
C. It is not magnetic.
D. It is cheap.

3. What is the main reason why aluminum is used as a material in making cooking pans

A. It is a good conductor of heat.
B. It is a good conductor of electricity.
C. It has a very high density.
D. It is a strong material.

4. Why are electrical wirings usually covered with a layer of plastic?

A. To make it look pretty.
B. To make it strong.
C. To help electricity flow along the wire.
D. To make it safe.

5. The following are characteristics of materials that are good conductors of heat and electricity EXCEPT one. Choose the letter only.

A. Thermal conductivity
B. Porosity
C. Malleability
D. Ductility ​