Unit 10: Lesson 4: What Are Electric Circuits?

A material that does not let heat or electricity move through it easily.

A material that lets heat or electricity travel through it easily.

A path along which electric charges can flow.

An electric circuit in which the electrical charges have only one path to follow.

• series circuit

• parallel circuit

An electric circuit that has more than one path for the electric charges to follow.

• series circuit

• parallel circuit

If a wire is disconnected, the circuit is an _____ circuit.

• open

• closed

When a light is on, it is part of a _____ circuit.

• open

• closed

Which is NOT a good conductor?

• silver

• aluminum

• copper

• glass

Which is NOT a good insulator?

• glass

• wood

• plastic

• aluminum

To build an electric circuit that can be turned on and off you need: a battery, wire, light bulb, and a _____.

• switch

• ruler

• buzzer

• string