Using Sound — Unit test Answers

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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 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
3

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.
4

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

A
compression.
B
medium.
C
rarefaction.
D
surface.
5

Sound waves are produced when something is caused to

A
reflect.
B
vibrate.
C
slow down.
D
get warmer.
6

The ability of the ears to do their job has most likely decreased in which person?

A
a middle-aged person
B
a school-aged child
C
a young adult
D
an elderly person
7

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
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
10

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.
11

Four waves are produced when a harp is strummed at four different times.Which wave will produce the highest pitch?

Question illustration
A
Wave 1
B
Wave 2
C
Wave 3
D
Wave 4
12

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
13

Changes in which property are heard when the Doppler effect occurs?

A
pitch
B
amplitude
C
volume
D
wavelength
14

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.
15

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.
16

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.
17

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

A
wavelength
B
amplitude
C
frequency
D
compression
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 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
20

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.

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