Circuits

A material that electricity can pass through easily is called a ______________ .

• contrast agent

• plastic

• conductor

• insulator

What is a switch's function in a circuit?

• to make electric current hotter or colder

• to turn on and off the flow of current

• to add more power to the circuit

The flow of electricity through a conductor is called...

• resistance

• voltage

• current

• source of electric current

The best conductors for electricity are made of...

• wood

• plastic

• rubber

• metal

An insulator

• blocks electricity.

• lets electricity flow easily.

• is the same as a conductor.

• none of these

Which is a measure of the potential energy in a battery or in part of a circuit?

• Meters

• Ohms

• Volts

• Amperes

Check the box next to all correct answers.

An electron ___________

• is a negatively charged particle.

• can move inside a conductor.

• is a positively charged particle.

• can move inside an insulator

Electric current is moving charged particles (for example, moving electrons).

• True

• False

A thin wire inside a light bulb that heats up and glows when the bulb is on

• electric current

• insulator

• electron

• filament

A circuit component that decreases the amount of current flowing in a circuit

• electron

• resistor

• battery

• Volt