What is the Doppler effect?

The change in frequency due to relative motion between source and observer

The bending of sound waves around obstacles

The reflection of sound waves off surfaces

The interference between two sound waves

In wave interference, what happens when a crest meets a trough of equal amplitude?

The wave becomes a straight line

Which of the following best describes the relationship between wavelength and frequency?

As wavelength increases, frequency decreases

As wavelength increases, frequency increases

As wavelength decreases, frequency decreases

Wavelength and frequency are not related

In a guitar, what primarily determines the pitch of the note produced?

The length of the vibrating string

What is the main difference between music and noise?

Music has regular, periodic vibrations

Noise travels faster than music

Why do sound waves travel faster in solids than in gases?

Solid particles are closer together

Solid particles are farther apart

How does the human ear amplify sound waves?

By using the small bones in the middle ear

By reflecting sound waves in the outer ear

What is resonance in the context of sound waves?

The amplification of sound at specific frequencies

The cancellation of sound waves

How does the pitch of a sound change as the source moves away from the listener?

It becomes inaudible immediately

What is the primary function of the cochlea in the human ear?

To convert sound waves into electrical signals

What happens when two waves with different frequencies interfere?

They create a wave with a varying amplitude over time

They always cancel each other out

They create a wave with a new, constant frequency

They create a wave with infinite amplitude

How does the wavelength of a sound wave relate to its ability to diffract around obstacles?

Longer wavelengths diffract more

Shorter wavelengths diffract more

Wavelength has no effect on diffraction

Only medium-length waves can diffract

What is the primary reason that sound cannot travel through a vacuum?

Vacuum lacks particles to transmit vibrations

Sound waves are too weak to enter a vacuum

How does doubling the frequency of a wave affect its wavelength?

The wavelength remains the same

Which of the following best describes how humans perceive loudness?

It's a logarithmic response to sound intensity

It's directly proportional to wave amplitude

It's directly proportional to wave frequency

It's inversely proportional to wave speed

This illustration shows three different waves traveling through the same medium.

The waves carry different amounts of energy.

The waves travel at different speeds.

The waves have different wavelengths.

The waves are a different distance from the source.

Mechanical Waves Practice Test

Authored by Michael Rockwell

Science

9th Grade

NGSS covered

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65 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of wave requires a medium to travel through?

Electromagnetic waves

Mechanical waves

Light waves

Radio waves

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a transverse wave, particles of the medium move:

Parallel to the direction of wave travel

Perpendicular to the direction of wave travel

In circular motions

Randomly in all directions

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a longitudinal wave?

Light waves

Water waves on the ocean surface

Sound waves in air

Waves on a vibrating string

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the relationship between frequency and period of a wave?

They are directly proportional

They are inversely proportional

They are independent of each other

They are always equal

Tags

NGSS.HS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a wave has a frequency of 5 Hz, what is its period?

5 seconds

0.5 seconds

0.2 seconds

2 seconds

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which property of a wave is related to the energy it carries?

Wavelength

Frequency

Amplitude

Speed

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the speed of a wave when it moves from air into water?

It increases

It decreases

It remains the same

It becomes zero

Tags

NGSS.MS-PS4-2

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Mechanical Waves Practice Test

Which type of wave requires a medium to travel through?

In a transverse wave, particles of the medium move:

Which of the following is an example of a longitudinal wave?

What is the relationship between frequency and period of a wave?

If a wave has a frequency of 5 Hz, what is its period?

Which property of a wave is related to the energy it carries?

What happens to the speed of a wave when it moves from air into water?

The bending of a wave as it passes from one medium to another is called:

Which phenomenon explains why you can hear someone around a corner?

When two waves combine to form a wave with larger amplitude, this is called:

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