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Sound

Total questions: 100

Worksheet time: 58mins

Name
Class
Date
1.

Why does sound travel faster in solids than in liquids or gases.

a)

They are harder.

b)

The particles are closer together.

c)

Solids have more energy.

d)

Gases fill their container.

2.

Which state of matter do sounds travel fastest in?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

3.

Roughly what is the speed of sound in air?

a)

The speed of light.

b)

About 10 m/s

c)

About 340 m/s

d)

About 1 500 m/s

4.

Calculate the speed of sound if a sound wave travels 1020 m in 3 seconds.

a)

3060

b)

365 m/s

c)

340 m/s

d)

250 m/s

5.

A sound wave travels through water at a speed of 1500m/s for 3.5 seconds. What distance does it travel?

a)

750m

b)

4 500m

c)

428.57m

d)

365m

6.

A teacher tries to work out the speed of sound. She bangs two bits of wood together. She hears an echo from a wall. The wall is 25m away. How far has the sound travelled?

a)

340 m

b)

25 m

c)

50 m

d)

12.5 m

7.

What is produce by vibration?

a)

Sound

b)

Light

c)

Rhythm

d)

Vibration

8.

On which medium sound travels the slowest because the particles are spread out?

a)

Solid

b)

Liquid

c)

Gas

9.

Amplitude affects which characteristic of sound waves?

a)

frequency

b)

pitch

c)

loudness

d)

wave speed

10.

Where does vibration produced when someone is speaking?

a)

Pharynx

b)

Larnyx

c)

Vocal Chords

d)

Trachea

11.
A sound with a high frequency has a _____ pitch. A sound with a ____ frequency has a low pitch.
a)
high, low
b)
low, high
c)
medium, high
d)
high, medium
12.

The ______ of a sound depends on the medium through which it's moving.

a)

pitch

b)

vibration

c)

speed

d)

loudness

13.
Sound moves in a _________.
a)
Transverse wave
b)
Longitudinal wave
14.
Area of a longitudinal wave where particles are CLOSE together.
a)
Compression
b)
Rarefaction
15.

Sound can travel through

a)

gases only

b)

solids only

c)

liquids only

d)

solids, liquids and gases

16.

Sound wave travels fastest in

a)

air

b)

metals

c)

vacuum

d)

liquids

17.

Sound cannot travel in vacuum

a)

TRUE

b)

FALSE

18.

If the amplitude of vibration is large, sound is feeble

a)

TRUE

b)

FALSE

19.

For human ears, the audible range is 20 Hz to 20 000 Hz

a)

TRUE

b)

FALSE

20.

The lower the frequency of vibrations, the higher is the pitch.

a)

TRUE

b)

FALSE

21.

If a wave complete 20 vibration in 2.5 s, then its frequency is

a)

200 Hz

b)

50 Hz

c)

20 Hz

d)

8 Hz

22.

Loudness or softness of a sound is depend on

a)

Amplitude

b)

Frequency

23.

Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the string suitably. By doing so, he is adjusting

a)

intensity of sound only

b)

amplitude of sound only

c)

frequency of the musical instrument

d)

loudness of sound

24.

In medium, the nature of sound wave is

a)

only transverse

b)

both longitudinal and transverse

c)

neither longitudinal and transverse

d)

only longitudinal

25.

If the frequency of a sound is below 20 Hz, it is known as ______ sound.

a)

Audible

b)

Infrasonic

c)

Ultrasonic

d)

None of the above

26.

The pitch of the sound is related to

a)

Frequency

b)

Intensity

c)

Amplitude

d)

Loudness

27.

Audible range for adult human beings is

a)

Less than 20 Hz

b)

20 to 20000 Hz

c)

21 000 - 50 000 Hz

d)

100- 120 kHz

28.

The diagram shows a wave. Which labelled distance is the wavelength?

a)

A

b)

B

c)

C

d)

D

29.

What do we use ultrasound for?

a)

taking photos of unborn babies

b)

taking photos of jewellery

c)

cleaning babies

30.

After a lockdown drill at a school, the management team notes that the lockdown siren is too quiet, and its pitch is too low to be heard at a distance.

They call the company that supplied the siren and ask them to make the alarm louder, and to give it a higher pitch.

What effect does the change have on the resulting sound wave produced by the siren?

a)

It has a larger amplitude and a lower frequency

b)

It has a larger frequency and a lower amplitude

c)

It has a smaller frequency and a larger amplitude

d)

It has a larger amplitude and a higher frequency

31.

Which of the following is not a mechanical wave?

a)

transverse waves

b)

surface waves

c)

longitudinal waves

d)

electromagnetic waves

32.

Which of the following terms is the measure of the distance between two neighboring crest or trough?

a)

wavelength

b)

hertz

c)

amplitude

d)

frequency

33.

What wave can travel in space?

a)

Mechanical

b)

Longitudinal

c)

Transverse

d)

Electromagnetic

34.

What type of wave is sound?

a)

transverse

b)

longitudinal

c)

electromagnetic

35.

Which type of wave is the disturbance of the medium perpendicular to the direction of travel of the wave?

a)

Longitudinal

b)

Transverse

c)

Electromagnetic

d)

Latitudinal

36.

Through which of the following would sound waves travel the fastest?

a)

Underwater

b)

Along A Railroad Track

c)

In Outer Space

d)

Through the Earth's Atmosphere

37.

The frequency of a sound wave determines which of the following?

a)

Amplitude

b)

Pitch

c)

Speed

d)

Loudness

38.

A reflected sound wave bounces back to the place of origin. A diffracted sound wave changes direction as it

passes through an opening.

a)

True

b)

False

39.

As a longitudinal wave passes through a medium, how do the particles of the medium move?

a)

Parallel

b)

Perpendicular

40.

Which of the following is an example of diffraction?

a)

sound bending around a corner

b)

sound through a wall being muffled

c)

An echo bouncing off a canyon wall

41.

When a transverse wave moves through a medium, how do the particles of the medium respond?

a)

Parallel

b)

Perpendicular

42.

Which characteristic of a wave changes as the wave travels across a boundary between two different

media?

a)

Phase

b)

Frequency

c)

Speed

d)

Pitch

43.

How does the speed of sound in sea water compare to the speed of sound in air?

a)

The speed of sound is faster in sea water because the molecules in sea water are closer to each other and

less dense.

b)

The speed of sound is slower in sea water because the molecules in sea water are closer to each other and

less dense.

c)

The speed of sound is faster in sea water because the molecules in sea water are closer to each other and

more dense.

d)

The speed of sound is slower in sea water because the molecules in sea water are closer to each other and

more dense.

44.

Why do we see lightning before we hear the thunder?

a)

Our eyes trick us.

b)

Light travels faster than sound.

c)

they're two separate things.

45.

A rarefaction is generated when particles move _______.

a)

together

b)

apart

c)

closer

d)

under

46.

The elasticity of a substance describes how fast or slow its particles bounce back-and-forth as ______________ move through the object.

a)

vibrations

b)

chemicals

c)

electrons

d)

surface wave

47.

Which physical property of a medium is defined by how close the particles of the substance are to each other?

a)

elasticity

b)

temperature

c)

density

d)

amplitude

48.

Which temperature causes sound to travel more slowly?

a)

hot

b)

cold

49.

The amount of energy a sound wave carries per second through a unit of area is its ______________.

a)

pitch

b)

intensity

c)

loudness

d)

frequency

50.

The ____________ of a wave increases with increased energy.

a)

wave length

b)

amplitude

51.

Loudness of waves is measured in ______________.

a)

hertz

b)

decibels

c)

watts

d)

meters/second

52.

The maximum safe level for loudness is __________.

a)

0 dB

b)

60 dB

c)

85 dB

d)

130 dB

53.

Frequency of waves is measured in __________.

a)

hertz

b)

decibels

c)

watts

d)

meters/second

54.

High frequency sounds have ___________ pitch.

a)

high

b)

low

55.

A change in frequency results in a change of wave length; a change in amplitude does not.

a)

true

b)

false

56.

The word supersonic describes:

a)

motion faster than the speed of sound.

b)

frequencies of sound too high for the human ear to hear.

c)

decibels of sound too soft for the human ear to hear.

d)

decibels of sound too loud for the human ear to hear.

57.

A decibel is a unit used to measure the:

a)

pitch of sound.

b)

color or complexity of sound.

c)

loudness of sound.

d)

frequency of a sound.

58.

“Dead spots” sometimes occur in a concert hall because:

a)

the designer of the building meant for no one to sit there.

b)

the frequency of sound waves in that spot is too high for humans to hear.

c)

destructive interference causes some of the sound to cancel out with its own reflections.

d)

beat frequencies cause damping of the oscillations.

59.

Which of the following sounds has the shortest wavelength?

a)

The rumble of thunder at 75 hertz

b)

A bass guitar at 150 hertz

c)

A male voice at 500 hertz

d)

A female soprano singer at 2,000 hertz

60.

Sound shows wave characteristics for all of the following reasons EXCEPT:

a)

the mass of sound increases as its frequency increases

b)

sound may be reflected and refracted

c)

the speed of sound is the product of frequency and wavelength

d)

sound shows evidence of diffraction and interference

61.

Ability to hear may be affected by:

a)

age.

b)

loud sounds.

c)

high frequency sounds.

d)

All of the above.

62.
What is number is rarefaction?
a)
1
b)
2
c)
3
63.
What is number is wavelength?
a)
1
b)
2
c)
3
64.
What is number is compression?
a)
1
b)
2
c)
3
65.
The distance between the line of origin to the top of the wave is called
a)
amplitude
b)
wavelength
c)
frequency
d)
speed
66.
Which wave in the diagram has the lowest frequency?
a)
1
b)
2
c)
3
d)
4
67.
The change in pitch of a sound as an object moves closer or farther away is a result of?
a)
Doppler effect
b)
Resonance
c)
reflection
d)
amplitude
68.

Identify 3 characteristics of a medium that affects the speed at which sound waves travel through it.

a)

density, stiffness and temperature

b)

compression, rarefaction and temperature

c)

loudness, density and stiffness

d)

loudness, temperature and density

69.

If the wavelength of a sound wave is increased, what would happen to the sound made by this wave?

a)

It would have a lower pitch

b)

It would get softer

c)

It would get louder

d)

It would have a higher pitch

70.

If the wavelength of a sound wave is decreased, what would happen to the sound made by this wave?

a)

It would have a lower pitch

b)

It would get softer

c)

It would get louder

d)

It would have a higher pitch

71.

If the amplitude of a sound wave is decreased, what would happen to the sound made by this wave?

a)

It would have a lower pitch

b)

It would get softer

c)

It would get louder

d)

It would have a higher pitch

72.

If the amplitude of a sound wave is increased, what would happen to the sound made by this wave?

a)

It would have a lower pitch

b)

It would get softer

c)

It would get louder

d)

It would have a higher pitch

73.

Which example is creating a sound wave with the shortest wavelength?

a)

Example X has the shortest wavelength

b)

Example Y has the shortest wavelength

c)

Examples X and W have the shortest wavelengths

d)

Examples W and Y have the shortest wavelengths

74.

Interference is the ________________________.

a)

maximum distance the particles in a medium move from their rest positions.

b)

amount of sound energy that passes through a square meter of space in one second

c)

occurs when waves that overlap combine and form a new wave.

d)

number of waves that pass by a certain position each second

75.

Intensity is the ________________________.

a)

maximum distance the particles in a medium move from their rest positions.

b)

amount of sound energy that passes through a square meter of space in one second

c)

occurs when waves that overlap combine and form a new wave.

d)

number of waves that pass by a certain position each second

76.

Amplitude is the ________________________.

a)

maximum distance the particles in a medium move from their rest positions.

b)

amount of sound energy that passes through a square meter of space in one second

c)

occurs when waves that overlap combine and form a new wave.

d)

number of waves that pass by a certain position each second

77.

Frequency is the ________________________.

a)

maximum distance the particles in a medium move from their rest positions.

b)

amount of sound energy that passes through a square meter of space in one second

c)

occurs when waves that overlap combine and form a new wave.

d)

number of waves that pass by a certain position each second.

78.

Wavelength is the ________________________.

a)

maximum distance the particles in a medium move from their rest positions.

b)

the distance between a point on one wave and the same point on the next wave.

c)

occurs when waves that overlap combine and form a new wave.

d)

number of waves that pass by a certain position each second.

79.

Pitch is the ________________________.

a)

maximum distance the particles in a medium move from their rest positions.

b)

the number of waves that pass by a certain position each second.

c)

the perception of how high or low a sound seems

d)

number of waves that pass by a certain position each second.

80.

The Decibel scale measures

a)

wavelength and frequency

b)

interference and beats

c)

intensity, or loudness

d)

frequency, or pitch

81.

________________is an increase in amplitude that occurs when an object that is vibrating at its natural frequency ______________ energy from a nearby object that is vibrating at the same frequency.

a)

Fundamentals; absorbs

b)

Overtones; absorbs

c)

Resonance; absorbs

d)

Beat; absorbs

82.

The amplitude of a sound wave is related most closely to its __________________.

a)

wavelength

b)

frequency

c)

intensity

d)

interference

83.

When a compression meets a rarefaction, it is called ______________ interference and the result is no sound.

a)

constructive

b)

destructive

c)

standing

d)

beat

84.

_________________ is the process an animal uses to locate an object by means of reflected sounds.

a)

Sonar

b)

Echo

c)

ultrasound

d)

Echolocation

85.

_________________ is a reflected sound wave.

a)

Sonar

b)

Echo

c)

ultrasound

d)

Echolocation

86.

_________________ is the collection of reflected sounds from the surfaces in a closed space.

a)

Absorption

b)

Reflection

c)

Reverberation

d)

Echolocation

87.

_________________ is the transfer of energy by a sound wave to the medium that it travels through.

a)

Absorption

b)

Reflection

c)

Reverberation

d)

Echolocation

88.

Soft sounds are more easily able to move into and through a wall than a loud sound.

a)

True

b)

False

89.

____________________ is the study of how sound interacts with structures.

a)

Engineering

b)

Acoustics

c)

Physical science

d)

Physics

90.

When you hear an echo, you hear the original sound then the reflected sound.

a)

True

b)

False

91.

You can only hear an echo if the sound wave returns more than ____________ seconds later.

a)

1

b)

.01

c)

10

d)

0.1

92.

_________________ is a system that uses the reflection of sound to find objects underwater.

a)

echolocation

b)

absorption

c)

sonar

d)

reverberation

93.

Sonar is an acronym for ___________

a)

sound- navigation-ranging

b)

search- navigation- ranging

c)

sound-noise-research

d)

sound-noise-reflection

94.

Physical therapist use ultrasound to _____________.

a)

treat stiff joints. muscles or spasms

b)

used to break apart kidney stones

c)

for a sonograms to see developing babies during pregnancy

d)

form images of parts of the body

95.

Sonograms are used to

a)

treat stiff joints. muscles or spasms

b)

used to break apart kidney stones

c)

form images of parts of the body

d)

see images of a baby developing during pregnancy

96.

Animals use echolocation to ____________ and _____________.

a)

swim; go deeper in the water

b)

communicate; locate and identify objects

c)

swim; and float to the surface

d)

All choices are correct.

97.

Rooms with no pictures, rugs, curtains or furniture _____________________.

a)

have an increased reverberation

b)

have a decreased reverberation

c)

has no effect on reverberation

d)

will completely eliminate reverberation

98.

Adding thick, soft rugs to a room will ___________.

a)

increase reverberation

b)

decrease reverberation

c)

has no effect on reverberation

d)

will completely eliminate reverberation.

99.

Ships use sonar to send low frequency sound waves into the water to calculate the distance of objects from the ship.

a)

True

b)

False

100.

Animals that use echolocation include_______________________.

a)

bats , whales, and dolphins.

b)

birds, fish, and dolphins.

c)

bats, whales, and fish

d)

whales, fish and birds

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