AnswersMS-Physical ScienceUsing Sound

Using Sound — Unit test Answers

25 verified answers
1
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Which two animals use echolocation?

A
bats and humans
B
bats and dolphins
C
dolphins and humans
D
dolphins and butterflies
2
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Which refers to the number of wavelengths that pass a fixed point in a second?

A
wavelength
B
amplitude
C
frequency
D
compression
3

Which types of waves requires matter to carry energy?

A
electromagnetic waves only
B
mechanical waves only
C
electromagnetic and mechanical waves
D
longitudinal and electromagnetic waves
4

What do digital signals turn sounds into?

A
analog signals
B
interference
C
continuity
D
zeros and ones
5

Which statement best describes how waves carry energy?

A
Energy moves from one place to another through the wave.
B
Energy increases as it moves through the wave.
C
Energy is completely consumed by the beginning of the wave.
D
Energy builds through the wave and is released at the end.
6

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
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
8

Which best describes what occurs when an object takes in a wave as the wave hits it?

A
transmission
B
absorption
C
reflection
D
refraction
9

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.
10

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

A
compression.
B
medium.
C
rarefaction.
D
surface.
11

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 are mechanical waves.
B
They are electromagnetic waves.
C
They will act like x-rays.
D
They will act like light rays.
12

Which best describes the order of the technology used to transmit a sound through the radio?

A
microphone → transmitter → microphone
B
radio → transmitter → radio
C
radio → transmitter → microphone
D
microphone → transmitter → radio
13

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.
14

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.
15

Sound waves are produced when something is caused to

A
reflect.
B
vibrate.
C
slow down.
D
get warmer.
16

On top a coiled spring labeled Wave A with coils, which are widely spaced then tightly spaced then widely space. On bottom a coiled spring labeled Wave B with coils, which are widely spaced then very tightly spaced then widely space.

Question illustration
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 a higher frequency than Wave B.
17

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.
18

An ultrasound tech is trying to identify an object, but the screen of the machine is broken. Which statement best describes this situation?

A
The generated sound wave will not be able to reflect off of the object.
B
The sound wave will not be generated, so there will be no echoes received.
C
The echoes will be made but will not be able to be received by the machine.
D
The machine can process echoes into images, but with the broken screen, they can't be displayed.
19

Which example would contain only longitudinal waves?

A
a crowd doing the wave at a sporting event
B
an ultrasound that transmits soundwaves
C
the waves formed by the ocean
D
playing the guitar strings
20

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.

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