Video & Quiz - Sound: Wavelength, Frequency, and Amplitude

What is sound?

• Electricity

• Heat

• Light

• Vibrations

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How can sound be represented?

• As lines and dots

• As circles and squares

• As colors and shapes

• As mountains and valleys

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What is the unit of frequency?

• Hertz

• Watt

• Volt

• Ohm

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What is the speed of sound in air?

• 340 meters per second

• 1500 meters per second

• 299,792,458 meters per second

• 186,282 miles per second

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What is the range of human hearing?

• 100 Hertz to 100,000 Hertz

• 10 Hertz to 100,000 Hertz

• 20 Hertz to 20,000 Hertz

• 1 Hertz to 1,000 Hertz

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What is a subsonic sound?

• A sound with a frequency of 20 Hertz

• A sound with a frequency higher than 20,000 Hertz

• A sound with a frequency of 20,000 Hertz

• A sound with a frequency lower than 20 Hertz

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What is a supersonic sound?

• A sound with a frequency higher than 20,000 Hertz

• A sound with a frequency lower than 20 Hertz

• A sound with a frequency of 20 Hertz

• A sound with a frequency of 20,000 Hertz

Tags

NGSS.MS-PS4-1

What happens when a loudspeaker generates sound?

• It generates electricity

• It produces heat

• It emits light waves

• It moves up and down, creating vibrations in the air

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What is the frequency of a speaker generating a sound with three pulses per second?

• 100 Hertz

• 3 Hertz

• 10 Hertz

• 30 Hertz

What does the wavelength of a sound wave represent?

• The direction of the wave

• The speed of the wave

• The height of the wave

• The width of the wave