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A movement back and forth. (vibration, wave)
vibration
Describes how high or low a sound is. ( loud , pitch)
pitch
as the bell rings, its vibrations result in spaces where air particles are squeezed together and spaces where air particles are spread apart. This movement of particles makes a kind of wave called a c _ _ _ _ _ _ _ _ _ _ w _ _ _
compression wave
M_ _ _ _ _ vibrates.
vibrates
S _ _ _ _ waves travel.
Sound
B _ _ _ _ hears sound.
Brain
