8.3 Test 1

What did the dissected speaker contain at its very center?

• A battery

• A light bulb

• A magnet

• A small motor

What was one of the components found wrapped around cardboard inside the speaker?

• Steel spring

• Rubber band

• Plastic tubing

• Copper wire coil

Why is a coil of copper wire placed inside a speaker?

• To make the speaker heavier

• To create a magnetic field

• To connect to the power source

• To add decoration

Tags

NGSS.MS-PS2-3

What evidence would be most reliable in concluding an energy transfer between the magnet and coil?

• If the magnet changes weight

• If either the magnet or the coil moves

• If the coil becomes hot

• If the coil changes color

Tags

NGSS.MS-PS3-5

Why is it significant to understand the interactions between the coil and magnet when connected to a battery?

• To see if the battery changes shape

• To identify if the coil can light up

• To observe how electric current creates a magnetic field

• To know the battery’s energy capacity

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Which evidence supports the claim that matching the poles of magnets causes a repulsion force?

• When both magnets push away from each other

• When one magnet lifts the other

• When both magnets stick together tightly

• When the magnets lose their magnetic properties

Tags

NGSS.MS-PS2-5

What is the best evidence that a coil of wire connected to a battery creates a magnetic field?

• It attracts or repels a nearby magnet.

• It warms up slightly.

• It changes color.

• It starts to glow.

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What is an independent variable in an experiment?

• The variable we want to keep the same in each test.

• The variable to observe or measure for effects.

• The result we get after the experiment is complete.

• The change we make to the system each time we test.

What is the effect of removing air from the vacuum chamber on the magnets?

• The magnets become stronger.

• The magnets lose their ability to attract each other.

• The magnets repel each other.

• The magnets still interact with each other.

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What could be happening in the space between magnets when they interact if energy is not transferring through air?

• Energy does not transfer at all.

• Energy is lost in the vacuum.

• Energy is transferred through magnetic fields.

• Energy is transferred through sound waves.

Tags

NGSS.MS-PS2-3

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