1

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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.

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

2

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Which best describes Earth’s magnetic field lines?

A

The field lines go out of Earth at the geographic South Pole and enter Earth at the geographic North Pole in the area where the magnetic pole aligns with the geographic pole.

B

The field lines go out of Earth near the geographic South Pole and enter Earth near the geographic North Pole in an area where the magnetic pole does not align with the geographic pole.

C

The field lines go out of Earth at the geographic North Pole and enter Earth at the geographic South Pole in the area where the magnetic pole aligns with the geographic pole.

D

The field lines go out of Earth near the geographic North Pole and enter Earth near the geographic South Pole in an area where the magnetic pole does not align with the geographic pole.

3

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.

4

Which element is magnetic?

A

calcium

B

copper

C

carbon

D

cobalt

5

Which statement about Earth’s core helps explain Earth’s magnetic field?

A

Earth’s core is composed of magnets.

B

Earth’s core is composed of iron and nickel.

C

The outer core is solid.

D

The inner core is liquid and moving.

6

The diagram shows the field lines near the poles, X and Y, of two magnets.

A

X: northY: south

B

X: southY: north

C

X: northY: north

D

X: southY: south

7

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

A

field.

B

induction.

C

poles.

D

force.

8

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

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.

9

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.

10

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.

Magnets and Magnetism Answers

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