Directions: Choose the correct answer and write the letter on the space provided.

___1. What do you call a material that allows electricity to pass through?
A. conductor B. insulator C. semi-conductor D. wire

___2. Which of these materials allow electricity to flow?
A. glass B. copper C. wood D. plastic

___3. How can we identify if a material is a good conductor of heat and electricity?
A. If heat and electricity cannot pass through easily.
B. If heat and electricity can pass through easily.
C. If a material is made up of wood.
D. If a material is made up of plastic.

___4. Which of these materials DO NOT allow electricity to pass through?
___5. How do conductors differ from insulators?
A. Conductors make electricity and heat pass through while insulators don’t.
B. Conductors and insulators make electricity and heat pass through.
C. Conductors and insulators do not make electricity and heat pass through.
D. Insulators make electricity and heat pass through while conductors don’t.

___6. Which is the best conductor of electricity?
A. aluminum B. gold C. copper D. silver

___7. Our body is also a good conductor of electricity because of the presence of ____.
A. blood B. hair C. water D. skin

___8. Why is electrical wiring usually covered with a layer of plastic?
A. To make it look pretty. B. To help electricity flow along the wire.
C. To make it safe. D. To make it strong.

___9. The following materials use conductor of heat and electricity to function except
one. Which is it?
A. lighted candle B. water heater
C. lighted electric bulb D. washing machine

___10. Why are cooking pots made of metals such as iron and aluminum?
A. Heat moves quickly through metals. B. Metals are cheap.
C. Metals are easy to find. D. Metals don’t melt.
___11. Which term defines a material that heat does not move through easily?
A. conduction B. conductor C. heat D. insulator

___12. Which would be the best heat insulator?
A. knitted hat B. paper hat C. copper pot D. metal fork

___13. Tony is boiling a pot of water on the stove. The black handle is made of rubber,
and the pot is made of copper. Why is the black handle made of rubber and the
pot of copper?
A. Rubber is good conductor, and copper is a good insulator.
B. Rubber is a poor insulator, and copper is a poor conductor.
C. Rubber is a good insulator, and copper is a good conductor.
D. Rubber is a good conductor, and copper is a good insulator.

___14. Mr. Stevens set up the demonstration lab for his classes. When both wires
touched the coin, the light bulb lit up. What did this tell the students about the
coin?
A. It is a good insulator. B. It is a good conductor.
C. It has low melting point. D. It would be attracted to a magnet.
___15. Which of the following materials is an electrical insulator?
A. Aluminum B. Rubber C. Gold D. Copper

___16. A material through which heat passes poorly is called __________________?
A. conductor B. energy C. heat D. insulator

___17. Materials through which heat and electricity pass easily and quickly are _______?
A. absorption B. conductor C. convection D. insulator

___18. Which of the following is not a good conductor of heat?
A. glass bottle B. stone C. tin can D. wood

___19. Which is not an example of an insulator?
A. leather B. plastic C. water D. rubber

___20. Which is not an example of a conductor?
A. aluminum B. copper C. cotton cloth D. gold
11 points ;-;