Longitudinal Wave - Where the particles vibrate along the same direction as the wave , Transverse Wave - Where the particles move at right angles to the direction of travel of the wave , Frequency - The number of waves per second , Crest/Peak - The top point of a wave , Trough - The bottom point of a wave , Amplitude - Distance from the axis to the crest or from axis to the trough , Wavelength - Horizontal distance from crest to crest or trough to trough,

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