Electricity Review

What is a switch's function in a circuit?

• to make the current hotter or colder
• turn on and off the flow of current
• the pathway that current flows
• to add more power to the circuit

Is the circuit pictured complete or incomplete? 

• Complete
• Incomplete

Which of the following is an insulator?

• an eraser

• a wire

• a penny

• a metal spoon

Which of the following is a conductor?

• wood

• rubber

• metal

• plastic

Imagine you are creating a circuit. It works and the light bulb turns on. Then you add a piece of plastic to the circuit, and the light bulb does not turn on. We can infer that the plastic is

• an insulator

• a conductor

• an electron

• static electricity

If the light bulb turns ON in a circuit, that means the circuit is

• open

• closed

Identify the conductor below.

• cloth rag
• plastic bottle
• gold ring

What supplies the energy in an electric circuit?

• light bulb
• conductor
• wire
• battery

Two batteries in a circuit make the lights in the circuit brighter than one battery.

• true
• false

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulate electricity