1. Materials through which electricity pass easily are called? a. Conductors
b. Insulators
c. Non-conductor
d. Metallic
c. Non-conductor

2. Materials that do not transmit electricity and heat are called?
d. Metallic
a. Conductor
b. Insulator

3. When a certain material is considered an insulator? If it
a. Allows the free electrons to tow easily through it.
b. Doesn't allow the tree electron to flow easily through it.
c. Protects the excess electron from getting very hot
d. Gives rise to the production of more electrons

4. How do we describe a conductor of electricity? It is a material that
a. Allows the free electrons to flow easily through it.
b. Has extra free electrons on its surfa
c. Has no free electrons that can move freely
d. Prevents the flow electrons from moving out of the wire.

5. Which of the following group of materials are good conductors of heat and electricity?
a. Copper, silver, gold, glass
b, Iron, copper, silver, gold
c. Wood, paper, cloth, plastic
d. Gold, paper, leather, plastic

6. Why metals are considered good conductors of heat and electricity? Because
a. they are very hard
b. they are heavy
c. they can speedily transfer heat
d. they are smooth

7. Why is copper wire, which is a good conductor covered with rubber?
a. so that it will not melt
b. so that it will look beautiful
c. to make it stronger
d. so that it will not be harmful

8. Which of the following group of materials are good conductors of
electricity?
a. copper, silver, gold, glass, and zinc
b. wood, paper, leather, and plastic
C. iron, copper, silver, gold, and nickel
d. gold, paper, cloth, and plastic

9. Which of the following is most likely to conduct electricity the lastest?
a. wood
b. plastic
d. rubber
C. iron grills

10. The following are good conductors of heat and electricity except.
a. silver spoon
b. golden ring
C. cotton
d. iron bar
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