The Nature of Sound

The ____ of a medium helps determine the speed of sound passing through the medium.

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NGSS.MS-PS4-2

The speed of sound travels through steel is much ____ than the speed of sound traveling through air.

How does the vibration of a drumhead cause a sound wave to form?

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Do sound waves always travel in a straight lines? explain

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What is sound?

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How is sound produced?

• Sound is produced when an object vibrates.

• Sound is produced by the absorption of heat energy.

• Sound is produced by the reflection of light waves.

• Sound is produced by the movement of air molecules.

How does sound travel through different mediums?

• By emitting particles that carry the sound waves.

• By generating electromagnetic waves that transmit the sound.

• By releasing sound energy that is absorbed by the medium.

• By creating vibrations or waves that propagate through the molecules of the medium.

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NGSS.MS-PS4-2

What is the speed of sound in air?

• 343 meters per second

• 1000 meters per second

• 500 meters per second

• 100 meters per second

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What is the frequency of a sound wave?

• Speed of the wave

• Number of cycles per second

• Wavelength of the wave

• Amplitude of the wave

What is the wavelength of a sound wave?

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