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.

2

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Two bar magnets are hung from metal rods and held in the position shown below. The magnets are released and swing freely. Which diagram best predicts their final position?

A

A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The magnets are both hanging to the left.

B

A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the left. The right magnet hangs to the right.

C

A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs to the right. The right magnet hangs to the left.

D

A rectangular box with 2 black lines running down from it, each to a horizontal bar magnet labeled N to the left and S to the right. There is a gap between the magnets. The left magnet hangs straight down. The right magnet hangs to the right.

3

Which element is magnetic?

A

calcium

B

copper

C

carbon

D

cobalt

4

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.

5

Mr. Garcia uses magnets to hold a poster on a steel filing cabinet because a main component of steel is

A

iron.

B

carbon.

C

plastic.

D

glass.

6

Mateo drew the field lines around the ends of two bar magnets but forgot to label the direction of the lines with arrows.

A

left

B

right

C

up

D

down

7

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

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

8

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.

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

9

In an illustration, lines of force are drawn around a magnet to illustrate the magnetic

A

field.

B

induction.

C

poles.

D

force.

10

Which refers to the ends of a magnet where the forces are strongest?

A

attracting forces

B

opposing forces

C

magnetic fields

D

magnetic poles

Magnets and Magnetism Answers

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