Transverse: Vibrations at 90 degrees to wave travel, Peaks, Troughs, Light, Gamma Rays, Secondary earthquake waves, Longitudinal: Vibrations in same direction as wave travels, Compressions, Rarefactions, Sound, Ultra sound, Primary Earthquake waves, Both: Transfer energy, Caused by vibrations, Wavelength equals one complete cycle, Amplitude is the size of the vibration., Do not transfer matter,

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