Magnetism

Magnetism is a

• form of energy

• force

• form of matter

• form of light

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NGSS.MS-PS2-3

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Which of the following will NOT increase the strength of an electromagnet?

• increasing the number of coils

• increasing the electrical current in the wire

• increasing the space between coils

• using a stronger magnet in the middle

Three bar magnets are held together as you see above. What are the magnets going to look like when they are released?

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NGSS.MS-PS2-3

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Which position of two magnets results in the greatest attraction between the magnets below?

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NGSS.MS-PS2-3

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If you cut a permanent magnet into four pieces, you will have _____ (Mark the one best answer.)

• A four temporary magnets

• B four smaller permanent magnets

• C two north poles and two south poles

• D four objects that are no longer magnets

A paperclip moves toward a magnet when the two objects are about 2cm apart. Is this evidence that a magnet has an invisible force?

• Yes

• No

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NGSS.MS-PS2-3

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Iron filings on a plate move into a distinct pattern when gently shaken above a magnet. Is this evidence that a magnet has an invisible force?

• Yes

• No

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NGSS.MS-PS2-3

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People often stick notes and other objects to refrigerator doors, using magnets. A student tried to do this, but the object he wanted to stick to the refrigerator fell to the floor. What could the reasons be?

• The refrigerator door is made of steel (that contains iron).

• The refrigerator door is made of aluminum (not a magnetic material).

• The object is too thick.

• The magnet is too weak.

• The object is too light.

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NGSS.MS-PS2-5

A magnet has an invisible magnetic field extending from its poles.

• True

• False

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

When we increased the number of magnets in our experiment, what happened to the strength of our magnetic field?

• It increased.

• It decreased.

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NGSS.MS-PS2-3

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