The science word for a regular backwards and forwards movement is ____. A sound will be loud if the particles have more energy. They will oscillate over a ____ distance. A sound will be quiet if the particles have ____ energy. They will oscillate over a ____ distance. If there are lots of waves made in 1 second, the sound will have a ____ pitch. If there are fewer waves made in 1 second, the sound will have a ____ pitch. In longitudinal waves, the particles oscillate in the ____ (or opposite) direction as the wave travels.

Longitudinal waves and sound

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