AnswersCSD Summer 2026 PhysicalEarth ScienceLab: Magnetic and Electric Fields

Lab: Magnetic and Electric Fields — Cumulative exam Answers

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Finley is trying to transmit a sound wave that will travel continuously, but he is frustrated by the excess noise. What kind of signal is Finley sending?

A
analog
B
digital
C
radio
D
infrared
2
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A wheelbarrow can be used to help lift a load, such as a pile of dirt, and then push the load across a distance.

Question illustration
A
a pulley and an inclined plane
B
a wheel and axle and a lever
C
a pulley and a wheel and axle
D
a lever and a wedge
3

Which types of electromagnetic waves have frequencies that are higher than those of ultraviolet light but lower than those of gamma rays?

A
microwaves
B
X-rays
C
infrared light
D
radio waves
4

Which is most likely to get hot fastest when touching a warm surface?

A
foam cup
B
wooden spoon
C
copper wire
D
plastic button
5

Farah is doing an experiment that involves calculating the speed of a longitudinal wave. What will most likely happen if she increases the temperature in the room?

A
The amplitude of the wave will increase.
B
The amplitude of the wave will decrease.
C
The speed of the wave will increase.
D
The speed of the wave will decrease.
6

A circuit contains two light bulbs connected in parallel. What would happen to the brightness of each light bulb if two more light bulbs were added in parallel to the first ones?

A
The brightness of each bulb would decrease because the total resistance of the circuit would decrease.
B
The brightness of each bulb would increase because the total resistance of the circuit would increase.
C
The brightness of each bulb would remain the same even though the total resistance of the circuit would decrease.
D
The brightness of each bulb would remain the same even though the total resistance of the circuit would increase.
7

Which wave is carrying the most energy?

A
A wave with large amplitude.
Option A
B
A wave with very large amplitude.
Option B
C
A wave with small amplitude.
Option C
D
A wave with medium amplitude.
Option D
8

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

A
increasing the temperature of the warmer object
B
increasing the area of their contact
C
reducing the thermal energy of the cooler object
D
reducing the time of their contact
9

Which term refers to the ability to do work?

A
energy
B
power
C
force
D
motion
10

Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?

A
brachytherapy
B
superficial external beam radiation therapy
C
radiopharmaceuticals
D
high intensity focused ultrasound
11

Which best describes a difference between electric current and static electricity?

A
Electric current is continuous, and static electricity is not continuous.
B
Static electricity is continuous, and electric current is not continuous.
C
Electric current involves the movement of electrons, and static electricity involves the movement of protons.
D
Static electricity involves the movement of electrons, and electric current involves the movement of protons.
12

Which type of electromagnetic waves make up the colors of a rainbow seen after a storm?

A
visible light
B
infrared light
C
X-rays
D
ultraviolet light
13

Which best explains why Greg’s hands get warm as he holds a bowl of hot soup?

A
Heat energy is created from the thermal energy in Greg’s hands.
B
Heat energy is absorbed by the soup from Greg’s hands.
C
Thermal energy from the soup moves to Greg’s hands.
D
Thermal energy from the surrounding air moves to Greg’s hands.
14

Based on the concept of the global conveyor belt, what happens to ocean water as it moves from Antarctica to the equator?

A
It transfers thermal energy to deeper layers of the ocean.
B
It becomes less dense and rises to the surface.
C
It transfers thermal energy to the area, warming the equatorial waters.
D
It becomes more dense and sinks to the ocean bottom.
15

What is the potential energy of a 25 kg bicycle resting at the top of a hill 3 m high? (Formula: PE = mgh)

A
75 J
B
735 J
C
245 J
D
37.8 J
16

What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (Formula: )

Question illustration
A
3 J
B
6 J
C
12 J
D
24 J
17

Which would increase the speed of a sound wave?

A
A wave passes from a solid to a liquid while remaining the same temperature.
B
The medium increases in temperature while remaining in the same phase.
C
The medium decreases in temperature while remaining in the same phase.
D
A wave passes from a liquid to a gas while remaining the same temperature.
18

Which best compares radiation and conduction?

A
Both transfer thermal energy from warm objects to cooler objects.
B
Both can transfer energy through empty space.
C
Both transfer thermal energy by electromagnetic waves.
D
Both involve the transfer of energy through direct contact.
19

Carla draws two circuit diagrams that connect the same components in different ways, as shown.

Question illustration
A
The total resistance in Circuit A is greater than that in Circuit B.
B
When a bulb in Circuit A goes out, the other bulbs keep shining.
C
The bulbs in Circuit A shine brighter than those in Circuit B.
D
When a bulb in Circuit B goes out, the other bulbs go out.
20

Marcus plucks at an outstretched coil and observes the following wave motion. What is the motion of the particles in this kind of wave?

Question illustration
A
The particles will move up and down over large areas.
B
The particles will move up and down over small areas.
C
The particles will move side to side over small areas.
D
The particles will move side to side over large areas.

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