Answers350CR Integrated ScienceEnergy Transformations

Magnets and Magnetism Answers

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1
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Before beginning an experiment, Mrs. Wilson warns her science class not to drop the bar magnets on the floor.

A
The magnet might lose its magnetism.
B
The magnet might make a startling noise.
C
The magnet might become stuck to the floor.
D
The magnet might cause the floor to become magnetic.
2
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Two bar magnets are labeled A and B. The ends of each magnet are numbered 1 or 2, but the poles are not labeled. When A1 is brought near B1, the bars repel.

A
A1 is the north pole of a magnet, and B1 is the south pole of a magnet.
B
A1 is the north pole of a magnet, and B1 is the north pole of a magnet.
C
A1 and B1 are opposite poles, but there is not enough information to tell which ones.
D
A1 and B1 are like poles, but there is not enough information to tell whether they are north poles or south poles.
3

Pairs of magnets are shown in the diagram.

Question illustration
A
W
B
X
C
Y
D
Z
4

How does the north pole of a magnet respond to the poles of other magnets?

A
It attracts both north and south poles.
B
It repels both north and south poles.
C
It attracts the north pole and repels the south pole.
D
It attracts the south pole and repels the north pole.
5

Which actions most likely cause the domains within a material to lose their alignment and become more randomized? Check all that apply.

A
heating the material
B
rubbing the material against a magnet
C
passing electricity around the material
D
placing the material in a magnetic field of opposite polarity
E
placing the material near a strong magnet
F
hitting the material
6

Barton conducts an experiment using three metallic bars that might be magnets. The bars are labeled A, B, and C. The ends of each bar are numbered 1 or 2.He places the end of one bar close to an end of a second bar and records his results in the table shown.Based on the data, which prediction should he expect to occur?

Question illustration
A
A2 repels B1.
B
C2 attracts B2.
C
B1 repels C1.
D
A1 attracts C2.
8

Steel objects can become temporary magnets because they are mainly composed of which element?

A
carbon
B
iron
C
nickel
D
cobalt
9

A magnetically soft material is placed in a strong magnetic field.

A
It will become a permanent magnet because the domains will remain aligned.
B
It will become a temporary magnet because the domains will remain aligned.
C
It will become a permanent magnet because the domains will easily realign.
D
It will become a temporary magnet because the domains will easily realign.
10

Which statement describes the magnetic field inside a bar magnet?

A
It points from north to south.
B
It points from south to north.
C
It forms loops inside the magnet.
D
There is no field within the magnet.

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