High Pitched Sound (image), Low Pitched Sound (image), Wave - A transfer of energy through a medium, More Energy = - Higher frequency and/or amplitude, Less Energy =  - Lower frequency and/or amplitude, Crest - The highest point of a transverse wave, Trough - The lowest point of a transverse wave, Amplitude - The measurement between the crest (or trough) and the rest position., Wavelength - The measurement between the 2 trough or 2 crests , Longitudinal Waves  - Move in the same direction, Transverse Wave - Moves perpendicular , Low Amplitude = - Softer Sound (lower volume), High Amplitude = - Louder Sound (higher volume),

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