AnswersOC27 Physical Sci-2003310-S1-Keuten-DAquinoUnit Test

Unit Test — Cumulative exam Answers

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Which compares the problems associated with radioactive waste created from generating electricity using fusion reactions to waste created from generating electricity using fission reactions?

A
The radioactive waste from fusion reactions becomes less hazardous much sooner than the waste from fission reactions.
B
The radioactive waste from fission reactions becomes less hazardous much sooner than the waste from fusion reactions.
C
Although their radioactive wastes are hazardous for the same period of time, fusion reactions produce less waste than fission reactions.
D
Although their radioactive wastes are hazardous for the same period of time, fission reactions produce less waste than fusion reactions.
22
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Which is an example of potential energy?

A
a swimmer kicking their legs
B
a car driving on the road
C
an arrow flying at a target
D
a yo-yo in someone’s hand
23

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)

A
3.9 m
B
4.0 m
C
39.2 m
D
40.0 m
24

The total energy in a system is 675 J. The kinetic energy changes from 296 J to 432 J. Which statement best describes the potential energy of this system?

A
It changes from 296 J to 432 J.
B
It changes from 379 J to 243 J.
C
It changes from 432 J to 296 J.
D
It changes from 243 J to 379 J.
25

Which type of energy is transferred by convection currents?

A
chemical
B
thermal
C
potential
D
electrical
26

Which is an example of radiation?

A
A melting snowman sweats drop of water under a bright sun.
Option A
B
A smiling man roasts marshmallows over a wood fire.
Option B
C
A cook stirs vegetables in a frying pan over a gas burner.
Option C
D
Three pairs of bare feet and lower legs walk across black pavement.
Option D
27

Linh builds a circuit from the diagram shown.

Question illustration
A
1 only
B
1 and 2 only
C
4 only
D
1, 2, and 4
28

Which situation would result in interference?

A
a wave bouncing off an object
B
a wave bending as it moves through an object
C
a wave scattering as it moves through an object
D
a wave increasing in energy as it hits another wave
29

What must be included when describing the displacement of an object?

A
measurement and direction
B
direction and speed
C
total distance and position
D
speed and total distance
30

Which is an example of the strong force in action?

A
A battery-powered radio produces sound.
B
A magnet keeps a cabinet door closed.
C
The Sun pulls on Earth as Earth moves around the Sun.
D
The protons in the nucleus of a carbon atom are held together.
31

A circuit has a current of 1.2 A. If the voltage decreases to one-third of its original amount while the resistance remains constant, what will be the resulting current?

A
0.3 A
B
0.4 A
C
1.2 A
D
3.6 A
32

At the coast on a summer day, the land is hotter than the ocean. Warm air over the land rises and is replaced by cooler air, causing a sea breeze. At night, the land cools quickly and the ocean is now warmer than the land. What will happen next?

Question illustration
A
Winds will stop blowing as the convection current ceases to flow.
B
The convection current will reverse direction, reversing the winds.
C
Winds will increase as the two convection currents overlap.
D
The convection current will move seaward, reversing the winds.
33

A doctor uses an instrument(s) that emits light and allows the doctor to view the inside of a patient’s intestine.

A
a telescope
B
a microscope
C
laser beams
D
fiber optics
34

Levi observed properties of three different waves and recorded observations about each one in his chart.

Question illustration
A
Wave W and Y are light waves. Wave X is a sound wave.
B
Wave W is a light wave.Waves X and Y are sound waves.
C
Waves Y is a sound wave. Waves X and W are light waves.
D
Wave W is a sound wave. Waves X and Y are light waves.
35

The diagram shows organisms a diver observed during an ocean dive.

Question illustration
A
the ocean surface
B
the ocean floor
C
the position of the clownfish
D
the position of the seaweed
36

This table shows four examples of experiments.

Question illustration
A
Lily and Henry
B
Astrid and Bob
C
Lily, Astrid, Henry, and Bob
D
Astrid, Henry, and Bob
37

Which shows the formula for converting from kelvins to degrees Celsius?

A
°C = (9/5 × K) +32
B
°C = 5/9 × (K – 32)
C
°C = K – 273
D
°C = K + 273
38

Liang is working with an electrical circuit. She replaces a straight electrical wire with a coiled wire.

A
increase the strength of the magnetic field when current flows through the circuit
B
decrease the strength of the magnetic field when current flows through the circuit
C
increase the current that flows through the wire when the circuit is active
D
decrease the current that flows through the wire when the circuit is active
39

The table represents the speed of a car in a northern direction over several seconds.

Question illustration
A
Column 1 should be titled “Time,” and Column 2 should be titled “Velocity.”
B
Column 1 should be titled “Velocity,” and Column 2 should be titled “Time.”
C
Column 1 should be titled “Time,” and Column 2 should be titled “Acceleration.”
D
Column 1 should be titled “Acceleration,” and Column 2 should be titled “Time.”
40

Noe is studying Wave A and Wave B. Wave A is rated at 100 dB, and Wave B is rated at 90 dB. Which statement can be made about the waves?

A
Wave A has fewer decibels than Wave B.
B
Wave A is louder than Wave B.
C
The intensity of both waves is the same.
D
The amplitude of both waves is the same.

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