8.2 Sound Waves

Front

What is amplitude?

Back

Amplitude is the maximum extent of a vibration or oscillation, measured from the position of equilibrium. It determines the loudness of a sound.

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NGSS.MS-PS4-1

Front

What happens in the inner ear?

Back

In the inner ear, sound waves are converted into nerve impulses that are sent to the brain for interpretation.

Front

What is compression in sound waves?

Back

Compression is a region in a sound wave where particles are close together, resulting from a back-and-forth motion.

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Front

What is rarefaction in sound waves?

Back

Rarefaction is a region in a sound wave where particles are spread apart, occurring between compressions.

Front

What is wavelength?

Back

Wavelength is the distance between the beginning of one compression to the beginning of the next compression in a sound wave.

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NGSS.MS-PS4-1

Front

What is the equilibrium position in a sound wave?

Back

The equilibrium position is the state where particles are at rest, and there is no net force acting on them.

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NGSS.MS-PS4-2

Front

How do sound waves travel through different mediums?

Back

Sound waves travel through solids, liquids, and gases, but they travel fastest in solids due to closer particle arrangement.

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NGSS.MS-PS4-2

Front

What is the relationship between frequency and pitch?

Back

Frequency is the number of waves that pass a point in one second, and it determines the pitch of the sound; higher frequency means higher pitch.

Front

What is the speed of sound?

Back

The speed of sound is the distance sound travels in a given amount of time, typically around 343 meters per second in air at room temperature.

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

Front

What is the Doppler effect?

Back

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

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