Magnets and Magnetism Answers

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A bar magnet and a second object are hung from metal rods. The diagram below shows what happens when both objects are released.

Question illustration
A
an iron bar
B
a steel bar
C
a bar magnet with its north pole on the left
D
a bar magnet with its south pole on the left
4

Jill uses a magnet to pick up a nail. Then, she touches the nail to a paper clip and picks up the paper clip. What will most likely happen when she pulls the magnet away from the nail?

A
The paper clip will stay attached to the nail because the nail is now a permanent magnet.
B
The paper clip will stay attached to the nail because the paper clip is now a permanent magnet.
C
The paper clip will fall off of the nail because the nail was only a temporary magnet.
D
The paper clip will fall off of the nail because the nail is now magnetized in the opposite direction.
5

Jolie builds a model of a maglev train. She uses disc magnets to levitate the train. A disc magnet has its north and south poles on its faces, as shown.

Question illustration
A
flat, so that the north pole of each magnet on the train points up and the north pole of each magnet on the track points up
B
flat, so that the north pole of the magnets on the train point up and the north poles of the magnets on the track point down
C
on edge, so that the north poles of the magnets on the train point to the front and the north poles of the magnets on the track point toward the rear
D
on edge, so that the north pole of each magnet on the train and on the track point toward the rear of the train
8

A compass taken to Earth’s moon does not point in a specific direction on the moon. What is the most likely reason for the difference between how the compass works on Earth and on the moon?

A
The moon lacks an atmosphere.
B
The moon contains no rocks that have iron.
C
The moon does not have a strong magnetic field.
D
The moon has no bodies of water.
9

Which statement describes a property of magnets?

A
Magnets repel objects that are made of iron.
B
Magnets attract sheets of paper.
C
Magnets attract or repel iron nails.
D
Magnets attract or repel other magnets.
10

Laticia draws the diagram below to show Earth’s magnetic field.

Question illustration
A
The dashed line should be drawn in the same place as the solid line.
B
The solid line should be drawn in the same place as the dashed line.
C
The arrows to the left of Earth should point down.
D
The arrows to the right of Earth should point up.

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