_________could be used in a simple circuit to make a light bulb glow.

• glass
• metal
• plastic
• rubber

Which material would be the BEST conductor to make the circuit light the bulb?

• rubber band
• glass
• penny
• wood

Tin cans, aluminum foil, copper wire, and an iron ball are all examples of good________

• conductors
• insulators

A magnet is the strongest at the _________

• top
• middle
• bottom
• poles

What attracts paper clips to the nail in an electromagnet?

• sound energy
• heat energy
• magnetic force
• gravitational force

Increasing the number of coils around an electromagnet makes it_____________.

• weaker
• stronger

In order for a magnetic field to be created in an electromagnet, what must flow through the wire?

• heat
• metal
• light
• electricity

Which material will give an electromagnet its GREATEST strength?

• iron
• tin
• copper
• aluminum

Decreasing the number of coils around a nail will _________its magnetism.

• strengthen
• weaken

Which would make the STRONGEST electromagnet?

• thick iron core
• thin iron core
• thick aluminum core
• thin aluminum core