Magnets and Magnetism Answers

1

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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

2

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Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.

A

to give the needle an electric charge

B

to make the needle sharper

C

to magnetize the needle

D

to flatten the side of the needle

3

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

4

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.

5

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.

6

Which element is magnetic?

A

calcium

B

copper

C

carbon

D

cobalt

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

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

A

field.

B

induction.

C

poles.

D

force.

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

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

Magnets and Magnetism Answers

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