crest - the highest point of the wave, trough - the lowest point of the wave, wavelength - the difference between the center of the two successive crests/troughs, resting position - water level at rest; midline, wave - a disturbance that through a medium and transfers energy from place to place, amplitude - The amplitude of a wave is its height, that is, half the distance from trough to crest., midline - A horizontal dashed line extends through the middle of the wave and is labeled the midline, sound wave - a sound wave is a longitudinal wave-when something an object vibrates it produces a longitudinal wave, transverse wave - a wave vibrating at right angles,

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