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Sound Review

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.
All waves carry
a)
energy
b)
light 
c)
matter
d)
particles
2.
What do we call the part of a compressional wave that is when the waves are squeezed together?
a)
compression
b)
rarefaction
c)
crest
d)
trough
3.
What do we call the part of a compressional wave that is spread a part?
a)
compression
b)
rarefaction
c)
crest
d)
trough
4.
Why would a wave change direction?
a)
Because it kept traveling through the same medium
b)
Because it went from one medium to another
c)
the amplitude was too large
d)
the frequency was too small
5.
What is a medium?
a)
something between a small and a large?
b)
the substance through which a wave can travel
c)
a pattern of vibration that simulates when a wave is standing still
d)
the distance from any point on a wave to an identical point on the next wave
6.

The orca uses this behavior of waves to locate food.

a)

Refraction

b)

Reflection

c)

Absorption

d)

Diffraction

e)

Interference

7.
Which wave behavior do noise cancelling headphones use?
a)
diffraction
b)
refraction
c)
constructive interference
d)
destructive interference
8.

How does the speed of sound change as it goes from air into water?

a)

It speeds up

b)

It slows down

c)

It does not change

9.

T/F: When sound waves move from one medium into another, their speed changes

a)

True

b)

False

10.

Which diagram best represents the shape and direction of a series of wave fronts after they have passed through a small opening in a barrier?

a)
b)
c)
d)
11.

Parallel wave fronts incident on an opening in a barrier are diffracted. For which combination of wavelength and size of opening will diffraction effects be greatest?

a)

short wavelength and narrow opening

b)

short wavelength and wide opening

c)

long wavelength and narrow opening

d)

long wavelength and wide opening

12.
True or False: Every object has at least one natural frequency.
a)
True
b)
False
13.
A tuning fork starts to vibrate when a certain note is played on the piano, This is an example of _______.
a)
resonance
b)
refraction
c)
diffraction
d)
reflection
14.
In ________ interference, the energy of the combined wave is greater than the energy of each of the two waves.
a)
destructive
b)
rarefaction
c)
resonance
d)
constructive
15.

A police speed trap calculates the speed of a car by using the Doppler shift produced when an electromagnetic wave is reflected off a moving car. To beat the trap the car could send a different frequency wave back to the policeman, the wave should be

a)

the same frequency as received.

b)

a higher frequency than received.

c)

a lower frequency than received.

d)

it's not possible to beat the trap.

16.
What best describes the doppler effect?
a)
An apparent change in frequency of a wave due to the relative motion between a wave source and an observer
b)
When sound changes pitch
c)
When light changes color
d)
An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.
17.
In a pitch-black night, you hear a police siren is getting higher and higher, could you tell if the car is coming toward you or driving away from you?
a)
coming toward you
b)
away from you
c)
going circles around you
d)
parking still
18.
What direction is this object moving?
a)
left
b)
right
c)
up
d)
down
19.
The highness or lowness of  a sound is ....
a)
speed
b)
pitch
c)
echo
d)
rarefaction
20.
The unit to measure the energy or intensity of a sound is ...
a)
natural frequency
b)
resonance
c)
reverberation
d)
decibel
21.
The frequency at which an object vibrates due to its material, size, and shape is known as...
a)
amplitude
b)
natural frequency
c)
diffraction
d)
compressional wave
22.
The human perception of the energy a wave carries is...
a)
reverberation
b)
pitch
c)
loudness
d)
echolaocation
23.
The system of echolocation used to map the bottom of the sea is ...
a)
sonar
b)
compression
c)
decibel 
d)
Doppler effect
24.
Which scenario would experience the greatest diffraction of sound waves?  Honking your horn in
a)
Downtown Dallas 
b)
On an open highway
c)
in the country side
d)
in the suburbs
25.
Does sound travel faster under water or in the air?
a)
Under water
b)
In the air
26.
Can sound travel through a vacuum?
a)
Yes
b)
No
27.
A noise has a frequency of 60 Hz. Can we humans hear it?  
a)
Yes
b)
No
28.
A noise has a frequency of 23,000 Hz. Can we humans hear it?  
a)
Yes
b)
No
29.
Describe the sound wave through air.
a)
longitudinal, perpendicular
b)
transverse, perpendicular
c)
longitudinal, parallel
d)
transverse, parallel
30.

The speed of sound in air is 343 m/s. If a sound wave has wavelength of 10 m, then what is its frequency?

a)

343 m/s

b)

3430 Hz

c)

3.43 Hz

d)

34.3 Hz

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