Waves Unit Test Review

What is amplitude?

• the distance equal to one wavelength

• the distance between one crest and the next crest

• half the distance from a crest to a trough

• the distance the wave moves in one second

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NGSS.MS-PS4-1

How many times greater is the amount of energy transferred by a wave with an amplitude of 2 compared to a wave with an amplitude of 1?

• 5x more energy

• 9x more energy

• 2x more energy

• 4x more energy

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NGSS.MS-PS4-1

Waves with greater energy have greater _____________.

• frequency

• wavelength

• amplitude

• intensity

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NGSS.MS-PS4-1

Which statement correctly describes the relationship between wavelength and frequency?

• As wavelength decreases, frequency increases because fewer waves pass a point each second.

• As wavelength increases, frequency increases because more waves pass a point each second.

• As wavelength increases, frequency increases because fewer waves pass a point each second.

• As wavelength decreases, frequency increases because more waves pass a point each second.

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NGSS.HS-PS4-1

The intensity of a sound wave decreases as the wave spreads out from the source of the sound.

• True

• False

What change could explain the difference between the waves?

• The speed of the wave increased.

• The energy provided by the source of vibrations increased.

• The source of vibrations increased the speed of vibrations.

• The wavelength of the wave increased

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

How does the speed of sound vary based on the density of the material the sound is traveling through?

• Sound travels faster through more dense materials

• Sound travels faster through less dense materials

• Sound travels slower through more dense materials

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sound waves are mechanical waves because they

• can travel through a vacuum

• can travel through empty space

• can't travel through a medium

• can't travel without a medium

The speed of sound in wood is ____ the speed of sound in water.

• less than

• greater than

• the same at all temperatures as

• the same at high temperatures as

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NGSS.MS-PS4-2

Humans can hear frequencies as low as 21 Hz. If the sound is measured during 5 seconds, how many wavelengths pass?

• 105

• 21

• 4

• 100

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NGSS.MS-PS4-1