Transverse, A wave with vibrations at right angles to the direction of energy travel., Longitudinal, A wave with vibrations parallel to the direction of energy travel., Amplitude, The distance from the equilibrium position to the peak or trough of a wave., Frequency, The number of waves generated per second, measured in hertz., Wavelength, The distance from identical point on a wave to the next identical point, often peak to peak., Compression, An area where particles are closer together., Rarefaction, An area where particles are further apart., Energy, This is what a wave transfers without transferring matter., Parallel, This word refers to something that is aligned in the same direction as something else., Perpendicular, This word refers to something being at right angles to something else., Wave, Transfers energy from one place to another without transferring matter., Vibration or oscillation, A movement back and forth around a single point., Time period, The time it takes for one complete wave

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