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5.2 Sound
VA Science SOL 5.2 Vocabulary
16
Science
5th Grade
04/18/2013

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Term
compression
Definition
the part of a sound wave where air molecules are pressed together
Term
decibel
Definition
the unit for measuring loudness
Term
echo
Definition
a reflected sound wave
Term
echolocation
Definition
the location of objects using reflected sound waves
Term
frequency
Definition
the number of wavelengths in a given amount of time
Term
hertz
Definition
the unit for measuring frequency
Term
infrasound
Definition
sound that has a frequency below the range of human hearing
Term
pitch
Definition
how high or low a sound is determined by the frequency
Term
rarefaction
Definition
the part of a sound wave where air molecules are spread apart
Term
reflection
Definition
the return of sound waves from a surface
Term
sound
Definition
a form of energy made and transmitted by vibrating matter
Term
sound waves
Definition
alternating areas of high and low pressure called compression waves
Term
ultrasound
Definition
sound that has a frequency above the range of human hearing
Term
vacuum
Definition
a space with absolutely no matter where sound cannot travel (ex. outer space)
Term
vibration
Definition
a back-and-forth movement of an object
Term
wavelength
Definition
the distance between two compressions or two rarefactions in a sound wave
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