Sound Waves: Explore the Characteristics and Effects of Sound

Question 1

Which of the following statements about sound waves and electromagnetic waves is correct?

Accepted Answer

Sound waves require a medium to travel through, unlike electromagnetic waves.

Accepted Answer

The frequency range of electromagnetic waves is wider than that of sound waves.

Answer

Both sound waves and electromagnetic waves propagate at the speed of light.

Answer

Sound waves and electromagnetic waves are both classified as transverse waves.

Question 2

What effect causes the perceived pitch of a sound to change when the sound source moves relative to the listener?

Accepted Answer

Doppler effect

Answer

Refraction

Answer

Reflection

Answer

Diffraction

Question 3

Which characteristic differentiates a longitudinal wave from a transverse wave?

Accepted Answer

Direction of particle displacement

Answer

Wave frequency

Answer

Wave amplitude

Question 4

Which of the following describes the relationship between the frequency of a sound wave and the perceived pitch of that sound?

Accepted Answer

Higher frequency sound waves have a higher perceived pitch.

Answer

Lower frequency sound waves have a higher perceived pitch.

Answer

The frequency of a sound wave does not affect the perceived pitch.

Question 5

Which property of a sound wave is NOT related to its pitch?

Accepted Answer

Loudness

Answer

Frequency

Answer

Amplitude

Answer

Wavelength

Question 6

The perceived loudness of a sound is determined by its:

Accepted Answer

Amplitude

Answer

Frequency

Answer

Wavelength

Answer

Velocity

Question 7

Which of the following describes the change in perceived pitch when the distance between the sound source and the listener changes?

Accepted Answer

Doppler effect

Answer

Reverberation

Answer

Resonance

Answer

Echo

Question 8

What unit is used to measure the intensity of sound?

Accepted Answer

Decibel

Answer

Hertz

Answer

Meter

Answer

Newton

Question 9

Which principle is used in echolocation, where animals emit sound waves to navigate their surroundings?

Accepted Answer

Reflection of sound waves

Answer

Refraction of sound waves

Answer

Diffraction of sound waves

Answer

Polarization of sound waves

Question 10

What is resonance, and how does it enhance the sound of musical instruments?

Accepted Answer

Resonance occurs when a sound wave's frequency matches an object's natural frequency, causing it to vibrate and amplify the sound.

Answer

Resonance occurs when two sound waves of different frequencies interfere, creating a louder sound.

Answer

Resonance only happens in solid objects and has no impact on musical instruments.

Question 11

What is the unit of measurement for frequency?

Accepted Answer

Hertz

Answer

Decibels

Answer

Metres

Answer

Seconds

Question 12

How is the pitch of a sound related to its frequency?

Accepted Answer

Higher frequency means higher pitch.

Answer

Higher frequency means lower pitch.

Answer

There is no relationship between frequency and pitch.

Answer

Lower frequency means higher pitch.

Question 13

Which of the following is NOT a property of sound waves?

Accepted Answer

Buoyancy

Answer

Amplitude

Answer

Wavelength

Answer

Polarisation

Question 14

What is the approximate speed of sound in air at room temperature?

Accepted Answer

343 m/s

Answer

299 m/s

Answer

170 m/s

Answer

120 m/s

Question 15

Which of the following materials is a good conductor of sound?

Accepted Answer

Water

Answer

Air

Answer

Wood

Answer

Rubber

Question 16

What is the Doppler effect?

Accepted Answer

The change in the frequency of a wave as the source or observer moves.

Answer

The change in the amplitude of a wave as the source or observer moves.

Answer

The change in the wavelength of a wave as the source or observer moves.

Answer

The change in the speed of a wave as the source or observer moves.

Question 17

Describe the difference between longitudinal waves and transverse waves.

Accepted Answer

Longitudinal waves oscillate parallel to the direction of propagation, while transverse waves oscillate perpendicular to the direction of propagation.

Answer

Longitudinal waves oscillate perpendicular to the direction of propagation, while transverse waves oscillate parallel to the direction of propagation.

Answer

Longitudinal waves have a higher frequency than transverse waves.

Answer

Transverse waves have a higher wavelength than longitudinal waves.

Question 18

Which factor primarily affects the loudness of a sound?

Accepted Answer

Amplitude

Answer

Frequency

Answer

Wavelength

Answer

Speed

Question 19

What is the SI unit of loudness?

Accepted Answer

Decibels

Answer

Hertz

Answer

Metres

Answer

Seconds

Question 20

How do the eardrum and inner ear collaborate to facilitate hearing?

Accepted Answer

The eardrum vibrates in response to sound waves, transmitting these vibrations to the inner ear via small bones. The inner ear converts these vibrations into electrical signals sent to the brain for interpretation.

Answer

The inner ear vibrates, causing the eardrum to move and produce sound.

Answer

The eardrum amplifies sound waves before they reach the inner ear.

Answer

The eardrum and inner ear operate independently in the hearing process.

Question 21

How do bats use echolocation to navigate and hunt?

Accepted Answer

Bats emit high-frequency sound waves that bounce off objects, creating a sound map of their surroundings.

Answer

Echolocation helps bats communicate with each other.

Answer

Bats have special receptors that can detect very low-frequency sound waves.

Answer

Echolocation is not a behavior that bats exhibit.

Question 22

The pitch of a sound is determined by its:

Accepted Answer

Frequency

Answer

Amplitude

Answer

Wavelength

Answer

Velocity

Question 23

At room temperature, the speed of sound in air is approximately:

Accepted Answer

343 m/s

Answer

330 m/s

Answer

356 m/s

Answer

369 m/s

Question 24

Which factor can affect the loudness of a sound?

Accepted Answer

Distance from the source

Answer

Frequency of the sound

Answer

Temperature of the medium

Answer

Wavelength of the sound

Question 25

The unit of frequency is:

Accepted Answer

Hertz

Answer

Decibel

Answer

Metre

Answer

Joule

Question 26

The operation of a stethoscope relies on the principle of:

Accepted Answer

Reflection of sound waves

Answer

Refraction of sound waves

Answer

Diffraction of sound waves

Answer

Interference of sound waves

Question 27

Which animal below utilizes echolocation for navigation and hunting?

Accepted Answer

Bats

Answer

Dogs

Answer

Cats

Answer

Fish

Question 28

How does the pitch of a sound wave change as its frequency increases?

Accepted Answer

It gets higher

Answer

It gets lower

Answer

It stays the same

Answer

It becomes distorted

Question 29

What is the unit of measurement for sound intensity?

Accepted Answer

Decibels

Answer

Hertz

Answer

Metres

Answer

Seconds

Question 30

Which of the following materials is a good conductor of sound waves?

Accepted Answer

Water

Answer

Air

Answer

Rubber

Answer

Wood

Question 31

What is the Doppler effect?

Accepted Answer

The change in frequency of a sound wave due to the relative motion between the source and observer

Answer

The reflection of sound waves off a surface

Answer

The absorption of sound waves by a material

Answer

The refraction of sound waves at a boundary

Question 32

Which of the following is a practical application of the Doppler effect?

Accepted Answer

Measuring the speed of moving objects

Answer

Detecting hidden objects

Answer

Tuning musical instruments

Answer

Amplifying sound

Question 33

What is the approximate speed of sound in air at room temperature?

Accepted Answer

340 m/s

Answer

1200 m/s

Answer

299,792,458 m/s

Answer

15 m/s

Question 34

Which of the following is a longitudinal wave?

Accepted Answer

Sound waves

Answer

Light waves

Answer

Water waves

Answer

Radio waves

Question 35

How does the loudness of a sound wave affect the amplitude of its graph?

Accepted Answer

Amplitude increases with loudness

Answer

Amplitude decreases with loudness

Answer

Amplitude is not affected by loudness

Answer

Amplitude is inversely proportional to loudness

Question 36

How does the loudness of a sound change as you move away from its source?

Accepted Answer

Gets quieter

Answer

Gets louder

Answer

Stays the same

Answer

Gets louder then quieter

Question 37

Which parts of the human ear are responsible for transmitting sound vibrations to the cochlea, where hearing takes place?

Accepted Answer

Eardrum and stapes

Answer

Pinna and eustachian tube

Answer

Cochlea and semicircular canals

Question 38

Which of these materials is most effective at blocking sound waves?

Accepted Answer

Steel

Answer

Rubber

Answer

Glass

Answer

Air

Question 39

What is the term for the perceived change in sound frequency due to relative motion between the source and observer?

Accepted Answer

Doppler Effect

Answer

Sound Reflection

Answer

Harmonic Distortion

Answer

Acoustic Interference

Question 40

Which factor does NOT influence the speed of sound in a medium?

Accepted Answer

Frequency

Answer

Temperature

Answer

Density

Answer

Elasticity

Question 41

What is the bending of sound waves when passing through different media called?

Accepted Answer

Refraction

Answer

Reflection

Answer

Diffraction

Answer

Interference

Question 42

Which device is commonly used to measure sound pressure levels?

Accepted Answer

Sound Level Meter

Answer

Voltmeter

Answer

Oscilloscope

Answer

Thermometer

Question 43

What is a defining characteristic of standing waves?

Accepted Answer

Nodes and antinodes

Answer

Uniform amplitude along the medium

Answer

Movement from one point to another

Answer

Amplitude decay over time

Question 44

What is the minimum displacement of a medium particle during sound wave propagation?

Accepted Answer

Amplitude

Answer

Wavelength

Answer

Frequency

Answer

Period

Question 45

Which of the following is NOT a characteristic of sound waves?

Accepted Answer

Carries an electric charge

Answer

Has wavelength

Answer

Has frequency

Answer

Has amplitude

Question 46

What unit is used to measure the frequency of sound waves?

Accepted Answer

Hertz (Hz)

Answer

Meter (m)

Answer

Decibel (dB)

Answer

Newton (N)

Question 47

How is the pitch of a sound related to its frequency?

Accepted Answer

Higher frequency results in higher pitch

Answer

There is no relationship between frequency and pitch

Answer

Lower frequency results in higher pitch

Answer

Higher frequency results in lower pitch

Question 48

Which factors influence the speed of sound in a medium?

Accepted Answer

Density and Elasticity

Answer

Pressure and volume

Answer

Temperature and humidity

Answer

Temperature only

Question 49

Define the Doppler effect.

Accepted Answer

The change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source

Answer

The interference of two or more waves

Question 50

Which type of wave is a sound wave?

Accepted Answer

Longitudinal

Answer

Transverse

Answer

Electromagnetic

Answer

Surface

Question 51

Approximately what is the speed of sound in air at room temperature?

Accepted Answer

343 meters per second (m/s)

Answer

170 m/s

Answer

595 m/s

Answer

1235 m/s

Question 52

What causes a sound wave to reflect?

Accepted Answer

A solid surface

Answer

A vacuum

Answer

A moving object

Answer

An open space

Question 53

In which unit is loudness measured?

Accepted Answer

Decibel (dB)

Answer

Newton (N)

Answer

Hertz (Hz)

Answer

Meter (m)

Question 54

What is a property of a resonant cavity?

Accepted Answer

Amplifies sound waves of specific frequencies

Answer

Reflects sound waves of all frequencies

Answer

Refracts sound waves of all frequencies

Answer

Absorbs sound waves of all frequencies