Lab: Thermal Energy Transfer — Unit test Answers

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The frequency of a wave does not change as it passes from one medium to another.What will most likely happen if a light wave moves from the air into a solid?

A
The wavelength of the light wave will increase.
B
The speed of the light wave will decrease.
C
The wavelength of the light wave will remain the same.
D
The speed of the light wave will remain the same.
4

If humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?

A
Ultraviolet light detects the presence of radioactive substances.
B
Ultraviolet light shows cold areas as blue and warm areas as red.
C
Ultraviolet light causes substances to fluoresce and give off visible light.
D
Ultraviolet light transmits information to AM and FM radio receivers.
5

When sound is created, it travels to the ear through a

A
compression.
B
medium.
C
rarefaction.
D
surface.
6

After the 1600s, how did observations of light being refracted change the way most scientists thought about light?

A
They no longer believed that light acted as waves.
B
They began to believe that light acted as waves.
C
They no longer believed that light acted as particles.
D
They began to believe that light acted as particles.
7

Which equation should be used to calculate the speed of a wave?

A
speed = frequency x wavelength
B
speed = frequency x hertz
C
speed = period x wavelength
D
speed = period x hertz
9

What will occur when the trough of Wave A overlaps the crest of Wave B?

A
Destructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
B
Constructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
C
Destructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.
D
Constructive interference will occur, causing the new wave to have less energy than Wave A or Wave B.
10

Which statement can be made about waves A and B?

A
Wave A has a lower amplitude than Wave B.
B
Wave A has a higher amplitude than Wave B.
C
Wave A has a lower frequency than Wave B.
D
Wave A has the same amplitude as Wave B.
12

Which part of the electromagnetic spectrum has the longest wavelengths?

A
radio waves
B
gamma rays
C
infrared light
D
ultraviolet light
13

Henri draws a wave that has a 4 cm distance between the midpoint and the trough. Geri draws a wave that has an 8 cm vertical distance from the trough to the crest.Which statement best describes the energy in Henri and Geri’s waves?

A
Henri’s wave has a higher amplitude and more energy.
B
Henri’s wave and Geri’s wave have the same amplitude and the same energy.
C
Henri’s wave and Geri’s wave have the same amplitude, but Geri’s has more energy.
D
Geri’s wave has a higher amplitude and more energy.
14

Sound waves are produced when something is caused to

A
reflect.
B
vibrate.
C
slow down.
D
get warmer.
15

A museum sets up a display of fluorescent minerals. Which best describes how electromagnetic waves can be used to enhance the display?

A
Infrared light shining on the minerals will cause them to give off visible light.
B
Visible light shining on the minerals will cause them to give off infrared light.
C
Ultraviolet light shining on the minerals will cause them to give off visible light.
D
Visible light shining on the minerals will cause them to give off ultraviolet light.
16

What do diffraction and refraction have in common?

A
They both involve interference.
B
They both involve wave interactions.
C
They both involve reflection.
D
They both involve construction.
19

Sound Wave A is moving through a medium that is decreasing in temperature.Sound Wave B is moving from a liquid to a gas medium.

A
They will speed up.
B
They will increase the density of their medium.
C
They will slow down.
D
They will decrease the density of their medium.
20

What is occurring when two waves traveling along the same medium meet and cancel each other out?

A
destructive interference
B
constructive interference
C
reflection
D
refraction

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