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Sound waves, reflection of sound

Total questions: 50

Worksheet time: 41mins

Name
Class
Date
1.

Which term refers to how high or low a sound seems to a person?

a)

intensity

b)

reflection

c)

volume

d)

pitch

2.

A system of detecting objects under water using reflected sound waves is

a)

dissonance

b)

sonar

c)

acoustics

d)

infrasound

3.

The picture shows sound waves from a musical instrument. In which way is the sound wave in picture 1 different from the sound wave in picture 2?

a)

it has a lower pitch

b)

It has a lower volume

c)

It has a greater amplitude

d)

It has a higher frequency

4.

Why can't sound waves travel through a vacuum?

a)

There are no particles to travel through and vibrate.

b)

It is not dense enough.

c)

The frequency is too high.

d)

Sound waves can travel through a vacuum.

5.

Choose the unit that is used to measure how loud or powerful a sound is.

a)

wavelength

b)

decibel

c)

longitudinal

d)

sonar

6.

Which wave represents the sound with the lowest pitch?

a)

A

b)

B

c)

C

d)

D

7.

What happens when a wave reflects?

a)

It bends as it enters a new medium.

b)

It splits into smaller waves.

c)

It bounces off the surface of a barrier.

d)

It bends to move around a barrier.

8.

The waves are traveling at the same speed.

Which wave has the greater frequency?

a)

Graph on the Left

b)

Graph on the Right

c)

Both have the same frequency

9.
When an ambulance move TOWARD you it sounds ________ pitched. 
a)
high
b)
low
c)
medium
10.

The speed of sound is different in different states of matter.

The speed of sound in water is 1500 m/s.

Which row correctly compares the speed of sound in ice and the speed of sound in steam with the speed of sound in water?

a)

A

b)

B

c)

C

d)

D

11.
The number of wavelengths that pass a point each second
a)
frequency
b)
wavelength
c)
pitch
d)
amplitude
12.
Material (matter) through which a wave travels
a)
medium
b)
Doppler Effect
c)
sound
d)
pitch
13.
How high or low a sound is; depends on the frequency (greater frequency= higher pitch)
a)
pitch
b)
frequency
c)
sound
d)
medium
14.
The number of wavelengths that pass a point each second
a)
crest
b)
amplitude
c)
frequency
d)
pitch
15.
A reflected sound wave
a)
frequency
b)
pitch
c)
echo
d)
rarefaction
16.

The diagram below shows the movement of two sound waves.

Which statement best explains how Wave 1 compares with Wave 2?

a)

Wave 1 has a louder sound.

b)

Wave 1 has a softer sound.

c)

Wave 1 has a higher pitch.

d)

Wave 1 has a lower pitch.

17.

A doorbell circuit converts electrical energy into mechanical energy. The mechanical energy is in the form of vibrations that ultimately produce

a)

chemical energy.

b)

thermal energy.

c)

radiant energy.

d)

sound energy.

18.

Which of the following images shows a change in frequency?

a)

b)

19.

Which of the following images shows a change in amplitude?

a)

b)

20.

What happens to sound waves when they go through a doorway into a room?

a)

They don't do anything

b)

They stop

c)

They close in

d)

They spread out

21.

How much matter, or mass, there is in an given amount of space, or volume, is called a _____________

a)

large

b)

vibration

c)

medium

d)

molecule

22.

Sound waves are made by ______

a)

Noise

b)

Vibrations

c)

Mouth

d)

People

23.

What is a medium?

a)

The material that the wave travels through

b)

A wave that is half way between large and small

c)

The height of the wave

d)

The top of the wave

24.

What medium is the frog's croak(sound) traveling through?

a)

Air

b)

Water

c)

Space

25.

Sound can travel through space.

a)

True

b)

False

26.

Thick walls will ________ more sound than a thin wall.

a)

Absorb

b)

Transmit

c)

Reflect

27.

The speaker producing a sound is _________ energy to the salt.

a)

Transmitting

b)

Reflecting

c)

Absorbing

28.

Does the hammer produce vibrations when you hit the hammer on a nail?

a)

Yes

b)

No

29.

Does snapping fingers produce vibrations?

a)

Yes

b)

No

30.
Why is the school library covered with carpet?
a)
So everyone can make a lot of noise
b)
to help absorb sounds to keep it quiet
c)
because it looks good
d)
to help absorb sounds so it can stay noisy
31.

The sound is now a higher note/tone. What changed?

a)

increase in amplitude

b)

decrease in amplitude

c)

increase in frequency

d)

decrease in frequency

32.
All sound begins with a _________________________
a)
particle
b)
ringing
c)
amplitude
d)
vibration
33.
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
34.
In what state of matter does sound travel the fastest?
a)
Solid
b)
Liquid 
c)
Gas
d)
Doesn't Matter
35.
Material (matter) through which a wave travels
a)
medium
b)
Doppler Effect
c)
sound
d)
pitch
36.

In materials in the same state of matter, sound travels more slowly in denser mediums.

a)

true

b)

false

37.

Sound travels FASTEST through which of these materials?

a)

A type of gas, like helium

b)

Empty space

c)

A metal such as iron

d)

Water

38.

Sound waves can travel through all of these except

a)

air

b)

steel

c)

water

d)

a vacuum

39.

Which of these materials would be best to put on the walls in a room to keep sound from making an echo?

a)

marble

b)

wood

c)

carpet

d)

glass

40.
The material through which a wave travels is called the —
a)
medium
b)
matter
c)
substance
d)
vacuum
41.

A longitudinal wave, such as a sound wave, can travel through

a)

solids only

b)

liquids only

c)

gas, liquids, and solids

d)

gas and a vacuum only

42.

Sound is able to travel faster in a solid than in air because the molecules in a solid are

a)

moving faster than air molecules

b)

larger than air molecules

c)

closer together than air molecules

d)

more easily moved than air molecules

43.
Which of the following determines the pitch of a sound wave?
a)
frequency
b)
density
c)
mass
d)
reflection
44.

The higher the frequency, the higher the pitch

a)

true

b)

false

45.

Sonar and echolocation use ----- to detect objects under water.

a)

Refraction

b)

Reflection

46.
Cletus wants to make ear protectors for people who work around loud jet engines at Hartsfield Airport in Atlanta. Which of the following materials should he experiment with for the best results?
a)
a material that produces sound
b)
a material that absorbs sound
c)
a material that transmits sound
d)
a material that amplifies sound
47.
You and your father inspect an empty house with the hopes of buying it. You walk through the rooms talking to one another, and you notice that your voices and footsteps are echoing in the big, empty house. What causes the echo?
a)
sound waves reflecting off smooth, flat surfaces throughout the house
b)
sound waves moving around the large rooms
c)
sound waves moving slowly through air
d)
sound waves refracting around corners in the empty rooms
48.
In General Sound waves travel the slowest in __________
a)
solid
b)
liquid
c)
Gas
d)
Plasma
49.

Way in which sound waves are used by animals such as dolphins and bats.

a)

Echolocation

b)

Transverse

c)

Doppler Effect

d)

Longitudinal

50.

True or False: Sound needs a medium.

a)

True

b)

False

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