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64 Cards in this Set
- Front
- Back
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The amount of energy in a sound, or the loudness of a sound |
amplitude
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How high or low a sound is;
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pitch
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Sound is a form of:
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energy |
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Sound travels in:
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waves
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How fast something vibrates
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frequency
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The distance on a wave measured from crest to crest
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wavelength
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Sound travels slowest through:
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gases
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Sound travels fastest through:
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solids
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The pitch of a sound is closely related to:
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frequency
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High pitch =
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high frequency
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Low pitch =
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low frequency
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High amplitude =
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loud sound
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Low amplitude =
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soft sound
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A sounds frequency is measured in:
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hertz
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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 lowest frequency that humans can hear is:
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20 hertz
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The highest frequency that humans can hear is:
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20,000 hertz
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A sounds loudness, or intensity, is measured in:
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decibels
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Humans feel pain at ____________ decibels
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120
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An unwanted sound:
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noise
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A reflected sound wave creates an:
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echo
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A place with NO matter, such as outer space
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Vacuum
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Bats and whales use _________________ to locate food that they cannot see
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echolocation
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Why do we see lightening before we hear thunder?
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Light travels much faster than sound
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How fast does sound travel through the air?
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about 750 mph
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Why does furniture, rugs, and carpet cut down echoes and noise in a house
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Soft objects absorb sound
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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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Name several animals that can hear sounds with very high frequency
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bats, dogs, cats, dolphin
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Name an animal that can communicate with low frequency sounds?
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elephant
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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 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 lower than 20 hertz?
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infrasoninc
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The rapid back and forth movement of something
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vibration
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In order for sound to occur, something must:
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vibrate
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If a jet is traveling at Mach 2.0, what does that mean?
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It is going twice the speed of sound
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What is the thin membrane inside your ear that detects vibrations
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eardrum
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What are the three tiny bones in your inner ear that vibrate.
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hammer, anvil, and stirrup
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The part of your inner ear that controls your balance:
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cochlea
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Light travels in straight paths called:
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rays
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How do we remember the colors of the visible spectrum?
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ROY G BIV
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Which color in the visible spectrum has the longest wavelength?
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Red
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Which color in the visible spectrum has the shortest wavelength?
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Violet
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How fast does light travel?
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186,000 miles per second
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When light bounces off an object it is:
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reflected
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When light is bent, it is:
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refracted
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When light is absorbed by an object it is turned to:
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heat
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When light travels through an object it is:
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transmitted
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A lens or mirror that is thicker in the middle and thinner at the edges
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convex
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A lens or mirror that is thinner in the middle and thicker at the edges
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concave
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Dark colored clothing will ___________ light and turn it into ____________
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absorb ; heat
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Light colored clothing will ___________ light and help keep you _____________
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reflect ; cool
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Objects that let all light pass through them are:
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transparent
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Objects that let no light pass through them are:
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opaque
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Objects that allow some light, but not all, to pass through them are:
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translucent
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When light hits an object and is stopped, it is:
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absorbed
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Clear glass, clean water, and air are:
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transparent
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Bricks, wood, and metals are:
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opaque
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Stained glass windows are:
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translucent
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Aluminum foil is:
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opaque
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Wax paper is:
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translucent
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Saran Wrap is:
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transparent
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A piece of glass shaped like a triangular prism that refracts light and separates it into the colors of the rainbow (ROY G BIV)
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prism |
