Sound: Properties, Transmission, and Applications

Question 1

How does the size of a sound wave affect how loud the sound seems? Provide examples to explain your answer.

Accepted Answer

The bigger the sound wave, the louder the sound seems. For instance, a loud clap has a larger sound wave than a soft whisper.

Answer

The smaller the sound wave, the louder the sound seems. For instance, a soft whisper has a smaller sound wave than a loud clap.

Answer

The size of a sound wave has no effect on how loud the sound seems.

Answer

The size of a sound wave is only related to the pitch of the sound, not how loud it seems.

Question 2

How does the shape of a room affect the sound inside? Explain what reverberation and resonance are, and provide examples.

Accepted Answer

Reverberation is the way sound bounces around a room, creating an echo, while resonance occurs when sound waves amplify specific frequencies within a room.

Accepted Answer

Rooms with smooth surfaces, like tiled floors and bare walls, have less reverberation than rooms with soft furnishings and uneven surfaces.

Accepted Answer

Concert halls are often designed with long reverberation times to enhance the sound of music.

Answer

The shape of a room has no impact on the sound within it.

Question 3

How do technologies like sonar and medical imaging use sound reflection? What are some challenges they face?

Accepted Answer

Sonar uses sound reflection to find objects underwater, but obstacles and noise can make it less effective.

Accepted Answer

Medical imaging uses sound reflection to create pictures of the body, but the clarity of the pictures can be limited by the density of the tissues being examined.

Answer

Sound reflection is not used in either sonar or medical imaging.

Answer

Sonar can find objects in complete darkness, while medical imaging cannot.

Question 4

When sound waves encounter an object, they can bend around it. What is this property called?

Accepted Answer

Diffraction

Answer

Reflection

Answer

Absorption

Answer

Refraction

Question 5

How does our brain use sound cues to pinpoint the direction of a sound?

Accepted Answer

Our brain uses the time difference between when a sound reaches each ear to determine its direction.

Answer

Our brain mainly uses the volume of a sound to determine its direction.

Answer

Our brain only uses the pitch of a sound to determine its direction.

Answer

Our brain cannot determine the direction of a sound solely by listening to it.

Question 6

Animals use sound for various purposes. Which of the following is NOT a way that animals use sound?

Accepted Answer

Cooking their food

Answer

Defending their territory

Answer

Attracting mates

Answer

Finding food using echolocation

Question 7

How do different materials absorb sound? Give an example of a sound-absorbing material and explain how it works.

Accepted Answer

Materials absorb sound by turning sound waves into heat.

Answer

Materials absorb sound by bouncing sound waves back.

Answer

Materials absorb sound by letting sound waves pass through them.

Answer

Materials absorb sound by making sound waves louder.

Question 8

You're in a large, empty room. When you make a sound, it sounds much louder than in a smaller room. Why?

Accepted Answer

The sound bounces off the walls and returns to your ears, making it louder.

Answer

The sound gets trapped in the room and can't escape, making it louder.

Answer

The air in the room is thicker, making the sound waves travel faster and louder.

Question 9

Sound travels in waves. What type of wave is a sound wave?

Accepted Answer

Longitudinal wave

Answer

Transverse wave

Answer

Surface wave

Answer

Electromagnetic wave

Question 10

What component is NOT part of a basic sound system?

Accepted Answer

Computer

Answer

Microphone

Answer

Speakers

Answer

Amplifier

Question 11

Which material allows sound to travel through it most quickly?

Accepted Answer

Solids

Answer

Air

Answer

Water

Question 12

Which of the following is NOT a negative effect of noise pollution on people?

Accepted Answer

Improved sleep

Answer

Hearing loss

Answer

Increased risk of heart disease

Answer

Damage to animal habitats

Question 13

How does sound travel through the air?

Accepted Answer

In waves

Answer

In straight lines

Answer

In circles

Answer

In spirals

Question 14

Which material is sound transmitted through most quickly: air, water, metal, or rubber?

Accepted Answer

Metal

Answer

Air

Answer

Water

Answer

Rubber

Question 15

What part of the ear detects sound waves?

Accepted Answer

Cochlea

Answer

Tympanum

Answer

Eardrum

Answer

Stapes

Question 16

Which of the following is NOT a way to reduce noise pollution?

Accepted Answer

Playing loud music

Answer

Closing windows

Answer

Using headphones

Answer

Planting trees

Question 17

What is the difference between a loud sound and a soft sound?

Accepted Answer

Loud sounds have a larger amplitude.

Answer

Loud sounds have a higher pitch.

Answer

Loud sounds have a lower pitch.

Answer

Loud sounds have a shorter wavelength.

Question 18

What makes sound?

Accepted Answer

Vibrating things

Answer

Light

Answer

Electricity

Answer

Heat

Question 19

What's the difference between loudness and pitch?

Accepted Answer

Loudness is how strong a sound is, and pitch is how high or low it is.

Answer

Pitch is how strong a sound is, and loudness is how high or low it is.

Answer

Both loudness and pitch are how strong a sound is.

Answer

Both loudness and pitch are how high or low a sound is.

Question 20

What happens to sound waves when they reach something?

Accepted Answer

They bounce off.

Answer

They disappear.

Answer

They go through it.

Answer

They bend.

Question 21

Which part of the ear turns sound waves into electrical signals?

Accepted Answer

Cochlea

Answer

Eardrum

Answer

Stapes

Answer

Anvil

Question 22

Which of these instruments makes the lowest sound?

Accepted Answer

Cello

Answer

Violin

Answer

Guitar

Answer

Piano

Question 23

What causes sound waves to travel through the air?

Accepted Answer

Vibrating air molecules create a wave of sound.

Answer

Air molecules moving in a circular motion

Answer

Air molecules moving in a straight line

Answer

Air molecules not moving at all

Question 24

How can you make a sound higher in pitch?

Accepted Answer

Increase the frequency of the sound wave.

Answer

Decrease the frequency of the sound wave.

Question 25

What is the unit used to measure sound volume?

Accepted Answer

Decibels

Answer

Hertz

Question 26

Which musical instrument produces sound by vibrating a string?

Accepted Answer

Piano

Answer

Drum

Question 27

What part of the ear converts sound waves into electrical signals?

Accepted Answer

Cochlea

Answer

Pinna

Question 28

What happens when sound waves bounce off an object and return to the source?

Accepted Answer

Reflection

Answer

Refraction

Question 29

What happens when an object vibrates?

Accepted Answer

It produces sound

Answer

It produces light

Answer

It produces heat

Answer

It produces electricity

Question 30

Which part of the ear detects vibrations and turns them into electrical signals?

Accepted Answer

Cochlea

Answer

Tympanum

Answer

Eustachian tube

Answer

Semi-circular canals

Question 31

What happens when sound waves bounce off a surface?

Accepted Answer

The sound waves create an echo.

Answer

The sound waves travel faster.

Answer

The sound waves stop moving.

Answer

The sound waves become louder.

Question 32

What is the purpose of a sound insulator?

Accepted Answer

To stop sound waves from passing through.

Answer

To make sound waves louder.

Answer

To make sound waves higher pitched.

Answer

To make sound waves lower pitched.

Question 33

Which musical instrument makes sound by plucking strings?

Accepted Answer

Guitar

Answer

Piano

Answer

Flute

Answer

Drums

Question 34

Which object produces the highest pitched sound? The sound is like a 'ting.

Accepted Answer

A bell

Answer

A large drum

Answer

A guitar string

Answer

A cymbal

Question 35

Which is NOT a good way to reduce noise when it is too loud?

Accepted Answer

Honking your car horn loudly

Answer

Covering your ears with earplugs

Answer

Planting lots of trees near the noisy area

Answer

Using soundproofing materials

Question 36

What is the name of the device used to change electrical signals into sounds you can hear, like in your computer?

Accepted Answer

Speaker

Answer

Microphone

Answer

Amplifier

Answer

Oscillator

Question 37

What is the name of the unit used to measure how fast a sound repeats itself?

Accepted Answer

Hertz

Answer

Decibel

Answer

Meter

Answer

Second

Question 38

What happens to sound waves when they go around the edge of a wall or other obstacle?

Accepted Answer

Diffraction

Answer

Reflection

Answer

Refraction

Answer

Echo

Question 39

Which object produces the sound with the highest pitch?

Accepted Answer

A small whistle

Answer

A large drum

Answer

A long guitar string

Answer

A heavy door slamming

Question 40

As we move away from a sound source, what happens to the volume of the sound?

Accepted Answer

It decreases.

Answer

It increases.

Answer

It stays the same.

Answer

It repeats.

Question 41

Which material allows sound to travel through it the fastest?

Accepted Answer

Metal

Answer

Air

Answer

Water

Answer

Wood

Question 42

What part of the ear starts vibrating when sound waves reach it?

Accepted Answer

Eardrum

Answer

Cochlea

Answer

Eustachian tube

Answer

Pinna

Question 43

Which of the following is NOT a property of sound?

Accepted Answer

Sound waves move in a straight line.

Answer

Sound can bounce off surfaces.

Answer

Sound needs air or another material to travel through.

Answer

Sound has a wavelength.

Question 44

What is the name of the process where sound waves are turned into electrical signals in the ear?

Accepted Answer

Transduction

Answer

Absorption

Answer

Reflection

Answer

Amplification

Question 45

Which device uses the Doppler effect to calculate how fast moving objects are travelling?

Accepted Answer

Radar

Answer

Sonar

Answer

Microphone

Answer

Telescope

Question 46

What is the scientific term for how loud a sound is?

Accepted Answer

Intensity

Answer

Frequency

Answer

Amplitude

Answer

Waveform

Question 47

What is the name of the effect that causes sound waves to bend when they pass from one material to another?

Accepted Answer

Refraction

Answer

Diffraction

Answer

Reflection

Answer

Absorption

Question 48

Which material would make the loudest sound if hit with a hammer?

Accepted Answer

A metal pan

Answer

A piece of wood

Answer

A cotton ball

Answer

A pillow

Question 49

When the object making a sound vibrates faster, what happens to the sound's pitch?

Accepted Answer

It gets higher

Answer

It gets lower

Answer

It stays the same

Answer

It gets louder

Question 50

Which of these is NOT a way that sound can travel?

Accepted Answer

Through a vacuum

Answer

Through the air

Answer

Through water

Answer

Through metal

Question 51

Which part of the ear vibrates when sound waves reach it?

Accepted Answer

Eardrum

Answer

Cochlea

Answer

Auditory nerve

Answer

Outer ear

Question 52

Which musical instrument produces sound by making a string vibrate?

Accepted Answer

Violin

Answer

Drums

Answer

Piano

Answer

Flute

Question 53

What property of sound helps us tell different instruments apart?

Accepted Answer

Timbre

Answer

Pitch

Answer

Volume

Answer

Duration

Question 54

What is the unit used to measure the loudness of sound?

Accepted Answer

Decibels

Answer

Hertz

Answer

Meters per second

Answer

Newtons

Question 55

How do we perceive sound?

Accepted Answer

Through our ears and brain

Answer

Through our skin

Answer

Through our eyes

Question 56

Which of these would sound travel fastest through?

Accepted Answer

Metal

Answer

Air

Answer

Water

Answer

Wood

Question 57

Which of these doesn't change the pitch of a sound?

Accepted Answer

How loud the sound is

Answer

How long the thing making the sound is

Answer

How fast the thing making the sound is moving

Answer

What the thing making the sound is made of

Question 58

What do we call it when something making a sound moves back and forth?

Accepted Answer

Vibrating

Answer

Wobbling

Answer

Shaking

Answer

Dancing

Question 59

Which of these makes sound by vibrating a string?

Accepted Answer

Guitar

Answer

Drum

Answer

Flute

Answer

Cymbal

Question 60

What do we measure loudness with?

Accepted Answer

Decibels

Answer

Hertz

Answer

Meters per second

Answer

Newtons

Question 61

Which animal uses sound to see in the dark?

Accepted Answer

Bats

Answer

Cats

Answer

Dogs

Answer

Elephants

Question 62

What changes sound waves into electrical signals?

Accepted Answer

Microphone

Answer

Speaker

Answer

Amplifier

Answer

Tuner

Question 63

Which material does sound travel through the fastest?

Accepted Answer

Steel

Answer

Air

Answer

Water

Answer

Cotton

Question 64

When someone strums a guitar string, what creates the sound?

Accepted Answer

The vibration of the string

Answer

The tension on the string

Answer

The length of the string

Answer

The shape of the guitar