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37 Cards in this Set
- Front
- Back
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10 hertz =
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10 vibrations per second
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100 hertz =
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100 vibrations per second
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The amount of energy in a sound, or the loudness of a sound
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amplitude
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Bats and whales use _________________ to locate food that they cannot see
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echo-location
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The distance on a wave measured from crest to crest
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wavelength
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High amplitude =
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loud sound
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The highest frequency that humans can hear is:
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20,000 hertz
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High pitch =
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high frequency
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Sound travels about ____ mph through the air
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750
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How fast something vibrates
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frequency
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How high or low a sound is
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pitch
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Humans feel pain at ____________decibels
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120
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A jet traveling Mach 2.0 is going _____ the speed of sound
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twice
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In order for sound to occur, something must:
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vibrate |
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Low amplitude =
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soft sound
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The lowest frequency that humans can hear is:
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20 hertz
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Low pitch =
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low frequency
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Name an animal that can communicate with low frequency sounds?
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elephant
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The part of your inner ear that controls your balance:
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cochlea
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The pitch of a sound is closely related to:
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frequency
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A place with NO matter, such as outer space
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Vacuum
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The rapid back and forth movement of something
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vibration
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A reflected sound wave creates an
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echo
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Sound is a form of:
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energy
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A sound’s frequency is measured in:
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hertz
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A sound’s loudness, or intensity, is measured in:
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decibels
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Sound travels fastest through:
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solids
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Sound travels in:
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waves
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Sound travels slowest through:
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gases
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An unwanted sound:
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noise
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What are the three tiny bones in your inner ear that vibrate.
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Hammer anvil stirrup |
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What do we call something that travels faster than the speed of sound?
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supersonic
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What do we call sounds with a frequency greater than 20,000 hertz?
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ultrasonic
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What is the thin membrane inside your ear that detects vibrations
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eardrum
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Which wave has more waves per second, a high frequency or low frequency sound
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high frequency
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Which wave is louder, a wave with a small amplitude or a high amplitude
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high amplitude
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Furniture, rugs, and carpets cut down on echos in a house because soft objects _____ sound
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absorb
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