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Anything you can touch or hold
Matter
The lowest part of a wave
Trough
Something that move energy without moving matter
Wave
The distance from one peak to another
Wavelength
A type of energy that travels in waves when something glows
Light
A type of energy that travels in waves when something shakes
Sound
The number of waves that move past a point in one second
Frequency
The height of a wave from its resting point
Amplitude
The highest point of a wave
Peak
The unit for frequency
Hertz