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QUESTION 1

Earth is like a bar magnet. What does this mean about its magnetic poles?

There are two magnetic north poles.

There is only a magnetic north pole.

There are both magnetic north and south poles.

There is only a magnetic south pole.
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QUESTION 2

Which of the following statements about electric charges and magnetic domains is true?

Electric charges must come in pairs—one positive and one negative.

Magnetic domains must come in pairs—one north and one south.

Electric charges and magnetic domains must come in pairs—one north and one south.

Electric charges and magnetic domains must come in pairs—one positive and one negative.
QUESTION 4

Which material cannot be made into a magnet?

aluminum

cobalt

iron

nickel
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QUESTION 5

Which material has magnetic domains and can be made into a magnet?

a glass bottle

an aluminum can

an iron nail

a plastic fork