AnswersCSD Summer 2026 PhysicalEarth ScienceLab: Magnetic and Electric Fields

Lab: Magnetic and Electric Fields — Cumulative exam Answers

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What must be true in order for magnetism to induce an electric current in a wire?

A
There needs to be a switch in the circuit.
B
There cannot be a switch in the circuit.
C
The wire must be part of a closed circuit.
D
The wire must be part of an open circuit.
2
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The table shows the dimensions of four wedges.

Question illustration
A
W
B
X
C
Y
D
Z
3

The diagram shows parts of a wave.Which is shown by the letter X?

Question illustration
A
trough
B
amplitude
C
crest
D
wavelength
4

Cindy pours cool milk into a hot bowl of oatmeal and then stirs it with a room-temperature spoon. Which substance will have heat flow from it to the other substances?

A
the milk
B
the spoon
C
the oatmeal
D
the surrounding air
5

Which of these actions would increase heat transfer between two objects?

A
establishing their thermal equilibrium
B
increasing the area of their contact
C
using objects with similar specific heats
D
reducing the time of their contact
6

Under which condition is no work done?

A
A force pushes an object and slows it down.
B
A force pulls an object and speeds it up.
C
A force pulls down on an object that moves downward.
D
A force pushes up on an object that stays in place.
7

Hedea made a study chart about nuclear energy.Which best describes the error in Hedea’s chart?

Question illustration
A
The nuclei of atoms are split apart in both fission and fusion.
B
The nuclei of atoms are joined together in both fission and fusion.
C
Fission converts nuclear energy to electrical energy, not thermal energy.
D
Fission and fusion convert nuclear energy to both radiant and thermal energy.
8

Which is equal to a temperature of 20°C?

A
20°F
B
68°F
C
36°F
D
32°F
9

The north pole of a bar magnet is moved close to the north pole of a second bar magnet. What prediction best describes how the first magnet responds when it is released?

A
It will move toward the second magnet because like poles repel.
B
It will move toward the second magnet because like poles attract.
C
It will move away from the second magnet because like poles repel.
D
It will move away from the second magnet because like poles attract.
10

Which occurs when a warm fluid cools down?

A
Energy is released to the environment.
B
Energy is absorbed from the environment.
C
The density of the fluid decreases.
D
The mass of the fluid decreases.
11

The diagram shows two charged objects, A and B.

Question illustration
A
A: positiveB: negative
B
A: negativeB: positive
C
A: negativeB: negative
D
A: positiveB: positive
12

Two bar magnets are held close together. When they are released, they move toward one another. Which best describes the original placement of the magnets?

A
The magnets are placed end to end with the north pole of each pointing toward the other.
B
The magnets are placed end to end with the south pole of each pointing toward the other.
C
The magnets are placed side by side with the like poles of each magnet near the other.
D
The magnets are placed side by side with the opposite poles of each magnet near the other.
13

Measurements of two electric currents are shown in the chart.

Question illustration
A
Current X has a greater potential difference, and the charges flow at a slower rate.
B
Current Y has a greater potential difference, and the charges flow at a slower rate.
C
Current X has a greater potential difference, and the charges flow at a faster rate.
D
Current Y has a greater potential difference, and the charges flow at a faster rate.

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