Sound is a form of ____. When the string of a guitar is plucked, it moves back and forth rapidly, or ____. When something vibrates, it produces sound. Sound energy travels outward in all ____ through air particles in the form of ____ ____ to reach our ears. When the sound waves strike your eardrum, these ____ are recognized and ____ by your brain as sound. We know that sound can travel through ____, liquids, and gases. Since sound is passed from one particle to another in waves, the ____ together the particles, the faster the sound travels. Higher ____ are seen in ____ peaks and result in ____ sounds. ____ amplitudes are seen in ____ peaks and result in ____ sounds.

Sound Energy

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