AnswersELPGEQ2 MJ Science 3 - 2002100 HCPS v24Magnets and Magnetism

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
2
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Mateo drew the field lines around the ends of two bar magnets but forgot to label the direction of the lines with arrows.

Question illustration
A
left
B
right
C
up
D
down
3

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

Question illustration
A
X: northY: south
B
X: southY: north
C
X: northY: north
D
X: southY: south
4

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
5

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.
6

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.
7

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.
8

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.
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 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.

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