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Waves — Test Answers

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Which statement can be made about waves A and B?

A
Wave A has a higher frequency than Wave B.
B
Wave A has a lower frequency than Wave B.
C
Wave A has a lower amplitude than Wave B.
D
Wave A has a higher amplitude than Wave B.
2
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Karl listed the steps involved when information is sent from transmitters to receivers. 1 - A signal is produced. 2 - Radio waves are modulated and amplified. 3 - An antenna sends modulated waves through the air. 4 - An antenna captures the modulated waves. 5 - A signal is heard, seen, or used. Which describes the missing step?

A
Before Step 3, radio waves are amplified and demodulated.
B
Before Step 5, radio waves are amplified and demodulated.
C
After Step 3, radio waves are amplified and demodulated.
D
After Step 5, radio waves are amplified and demodulated.
3

Which part of the electromagnetic spectrum has the longest wavelengths?

A
ultraviolet light
B
infrared light
C
radio waves
D
gamma rays
4

Lena would like to be able to know her exact location on a map as she travels across the country. Which technology would best help Lena?

A
radio telescope, because it captures radio waves from space
B
CB radio, because it uses HF radio waves
C
MRI, because it uses magnets to produce a picture
D
GPS, because it uses satellites that provide position and velocity data
5

When light bends as it passes from one transparent object to another, the light is ________. Which best completes the statement?

A
reflected
B
absorbed
C
bounced
D
refracted
6

Atomic bombs send out a shock wave when they are detonated. This occurs because the bomb’s detonation superheats the air particles nearby, which cause them to bump into other air particles that further the wave. Which statement can most likely be made about the shock waves of atomic bombs?

A
They will act like light rays.
B
They will act like x-rays.
C
They are electromagnetic waves.
D
They are mechanical waves.
7

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
Visible light shining on the minerals will cause them to give off ultraviolet light.
D
Ultraviolet light shining on the minerals will cause them to give off visible light.
8

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. Which statement can be made about both waves?

A
They will speed up.
B
They will decrease the density of their medium.
C
They will slow down.
D
They will increase the density of their medium.
9

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 particles.
B
They began to believe that light acted as waves.
C
They no longer believed that light acted as waves.
D
They began to believe that light acted as particles.
10

Which refers to the number of wavelengths that pass a fixed point in a second?

A
wavelength
B
frequency
C
amplitude
D
compression
11

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

A
speed is equal to period times hertz
B
speed is equal to frequency times hertz
C
speed is equal to period times wavelength
D
speed is equal to frequency times wavelength
12

Which example would contain only longitudinal waves?

A
playing the guitar strings
B
a crowd doing the wave at a sporting event
C
an ultrasound that transmits soundwaves
D
the waves formed by the ocean
13

Prisms separate ________ light, such as that from the Sun, by wavelength. Which best completes the statement?

A
black
B
infrared
C
white
D
ultraviolet
14

Which part of the electromagnetic spectrum is necessary for the sense of sight in humans?

A
radio waves
B
visible light
C
infrared light
D
gamma rays
15

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

A
reflection
B
constructive interference
C
destructive interference
D
refraction
16

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 less energy than Wave A or Wave B.
B
Destructive interference will occur, causing the new wave to have more energy than Wave A or Wave B.
C
Constructive 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 more energy than Wave A or Wave B.
17

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

A
medium.
B
compression.
C
rarefaction.
D
surface.
18

What do diffraction and refraction have in common?

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

Which statement best describes how waves carry energy?

A
Energy increases as it moves through the wave.
B
Energy is completely consumed by the beginning of the wave.
C
Energy moves from one place to another through the wave.
D
Energy builds through the wave and is released at the end.
20

Which types of waves requires matter to carry energy?

A
longitudinal and electromagnetic waves
B
electromagnetic and mechanical waves
C
mechanical waves only
D
electromagnetic waves only

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