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Quiz #4 Sounds

Total questions: 37

Worksheet time: 2hrs 44mins

Name
Class
Date
1.
The speed of sound at 20 degrees celcius is:
a)
331 m/s
b)
365 m/s
c)
621 m/s
d)
343 m/s
2.

Material (matter) through which a wave travels

a)

medium

b)

Doppler Effect

c)

sound

d)

pitch

3.
Sound waves are ALWAYS what type of wave?
a)
Transverse
b)
Longitudinal
c)
Electromagnetic
d)
Surface Wave
4.
The part of a longitudinal wave where the particles of the medium are close together.
a)
rarefaction
b)
compression
c)
crest
d)
trough
5.
A part in a longitudinal wave where the particles are spread apart
a)
compression
b)
rarefaction
c)
crest
d)
trough
6.
In what state of matter does sound travel the slowest?
a)
Solid
b)
Liquid 
c)
Gas
d)
Doesn't Matter
7.
Sound is able to travel faster in solids than in air because the molecules in a solid are
a)
closer together than air molecules
b)
more easily moved than air molecules
c)
moving faster than air moleculesmoving faster than air molecules
d)
larger than air molecules
8.
What is a natural Vaccuum that Sound cannot travel through?
a)
Water
b)
Air
c)
Liquids
d)
Outer Space
9.
When a sound is LOUDER what measurement gets bigger?
a)
Frequency 
b)
Amplitude 
c)
Wavelength 
d)
Trough
10.

If you want to change the pitch of a sound, you have to change the ___

a)

frequency

b)

amplitude

c)

speed

d)

volume

11.
Waves transfer _____________ from one place to another
a)
Particles
b)
Energy
c)
Force
d)
Gravity
12.
When the sound source moves, the frequency changes
ex. ambulance sounds higher in pitch as it approached you
a)
pitch
b)
frequency
c)
Doppler Effect
d)
medium
13.

This is the unit used to measure the volume of a sound.

a)

Decibel

b)

Medium

c)

Vibration

d)

Oscilloscope

14.

The speed of a sound wave depends on

a)

the frequency

b)

the medium

c)

both air temperature and medium

d)

the air temperature

15.
If the distance represented by the letter A were decreased, how would it change the way the sound was heard?
a)
The sound would be higher. 
b)
The sound would be lower. 
c)
The sound would be softer. 
d)
The sound would be louder. 
16.

Which of the following would you hear as a LOW PITCHED sound?

a)

sound wave with a frequency of 50 Hz

b)

sound wave with frequency of 10,000 Hz

c)

sound wave with an intensity of 10 dB

d)

sound wave with an intensity of 100 dB

17.

the amplitude of a wave is the

a)

length of one wave

b)

frequency

c)

state of rest

d)

displacement from its state of rest

18.

This is what you get when sound waves are reflected, or bounce back, off of a hard surface.

a)

Amplitude

b)

Pitch

c)

Volume

d)

Echo

19.
The units for frequency are measured in _____________.
a)
hertz
b)
seconds
c)
m/s
d)
m
20.

What property of this wave is represented by the letter "A"

a)

amplitude

b)

crest

c)

trough

d)

wavelength

21.

The highest point on a wave is:

a)

the crest

b)

the trough

c)

the top

d)

the coast

22.

The number of wavelengths that pass a point each per second is:

a)

frequency

b)

period

c)

longitudinal

d)

transverse wave

23.

The type of waves that require medium to pass:

a)

Mechanical Waves

b)

Electromagnetic Waves

24.

Which comes first: lightning or thunder?

a)

lightning

b)

thunder

25.

Multiple echoes of a sound is called...

a)

reverberations

b)

resonance

c)

acoustics

d)

harmonics

26.

A wave that is 2 m long passes by with a frequency of 6 Hz. What is the speed at which this wave travels?

a)

12 m/s

b)

3 m/s

c)

0.5 m/s

d)

36 m/s

27.
An elephant produces a sound wave with a frequency of 11 Hz. Assuming the speed of sound in air is 345 m/s, determine the wavelength of this infrasonic sound wave.
a)
11,000 m
b)
31 m
c)
11 Hz
d)
0.090 m
28.
Playing middle C on the piano keyboard produces a sound with a frequency of 256 Hz. Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to the note of middle C.
a)
1.35m
b)
0.742m
c)
88,300m
d)
345m
29.
A musician plays his clarinet (a wind instrument) for several minutes in order to warm it up. As the temperature of the air in the clarinet increases. which of the following changes occur? 
a)
Both the fundamental frequency and the fundamental wavelength increase. 
b)
The fundamental frequency increases, and the fundamental wavelength decreases. 
c)
The wave speed increases, and the fundamental frequency increases. 
30.
Which of the following does not increase the pitch of a guitar string, if all the other factors remain the same? 
a)
tightening the string
b)
shortening the string
c)
replacing the string with a thinner string
d)
plucking the string with more force
31.
Where is the speed of sound the greatest? 
a)
in air
b)
in a vacuum
c)
in a rigid solid, such as steal
d)
in a flexible solid, such as rubber
32.

Speed of sound is usually ___________; that means, it's speed stays the same and doesn't change UNLESS the sound travels through a different medium or the medium undergoes a temperature change.

a)

331 m/s

b)

350 m/s

c)

346 m/s

d)

343 m/s

33.

A wave has wavelength of 10 m and a speed of 340 m/s. What is the frequency of the wave?

a)

34 m/s

b)

3400 Hz

c)

3400 m/s

d)

34 Hz

34.

You stand on the sidewalk next to the street. A fire truck is moving towards you. The frequency of the siren on the fire truck is 600 Hz.


What should you hear?

a)

Frequency higher than 600 Hz

b)

Frequency lower than 600 Hz

c)

Exactly 600 Hz

d)

No sound, silence.

35.

A car moves at 20 m/s towards a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.


What is the frequency observed by the driver of the car?

a)

530 Hz

b)

470 Hz

c)

520 Hz

d)

480 Hz

36.

A car moves at 20 m/s away from a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.


What is the frequency observed by the driver of the car?

a)

530 Hz

b)

470 Hz

c)

520 Hz

d)

480 Hz

37.

You look at a star through a telescope. You use a special camera to measure the light being emitted from the star. The star should be a blue color, but it appears to be slightly purple.


What is the star doing?

a)

Moving away from the Earth.

b)

Moving towards the Earth.

c)

Motionless in space.

d)

Shrinking in size.

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