Chapter B3 Test Review

As you rub a balloon on your sleeve, it picks up a

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NGSS.MS-PS2-3

Magnetic force is strongest at a magnet's

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NGSS.MS-PS2-5

When you push the button on a doorbell, you are ________ a circuit.

Electromagnets are useful because they can be turned on or off by opening or closing an

The northern lights are caused when

• electric power is generated from nuclear energy

• the sun's energy becomes too intense and burns the forests in the far north

• the earth's magnetic poles change places

• charged particles form a pattern around the earth's magnetic poles

A magnet is anything that

• can pull iron and steel toward it

• has positive and negative charges

• is present in the earth's crust

• can create electricity

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NGSS.MS-PS2-5

The purpose of insulation on an electric wire is to

• resist the flow of electricity and light up

• make the electric current stay on its path

• heat the wire and generate electricity

• close the circuit and make electricity flow

An electromagnet is created when ________ flows through a wire coil.

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Explain what causes the northern lights.

Electric current can be generated by

• sliding a magnet back and forth through a coil wire

• attaching a compass to a lodestone

• harnessing the magnetic energy in the earth's atmosphere

• capturing the flow of electricity with a meter

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