fast movements back and forth or from side to side - vibration, solids, liquids, gases - medium, highest part of wave - crest, low part of wave - trough, measurement of sound - decibel, how high or low the sound is - pitch, high frequency & short wave length - high pitch, low frequency & long wave length - low pitch, a form of energy that travels as waves through matter - sound, how loud or quiet a sound is - volume, how hard you push or pull something - force, How close or far something is - distance, how tight or loose something is - tension, how big or wide something is - thickness,

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