Amplitude, Size of sound wave, which causes volume (or loudness), Anvil, Bone of the middle ear (also stirrup and hammer), Cochlea, Part of inner ear where liquid and hairs vibrate, Decibel (db), Unit of volume/loudness, Eardrum, Part of middle ear which vibrating air hits, Echo, Sound bouncing (reflecting) off surfaces, Energy, Property of a material which can be transferred, cannot be created or destroyed. Often makes particles vibrate, Frequency, Number of waves per second, which causes the pitch of the sound, Hammer, Bone of the middle ear (also stirrup and anvil), Hertz (Hz), Unit of frequency, Pinna, Flap of skin on side of head which catches sound waves, Pitch, What a noise sounds like. The note we hear. Caused by the frequency of the sound wave, Stirrup, Bone of the middle ear (also anvil and hammer), Vacuum, Empty space (no particles at all), sound can't travel through it, Vibration, Movement backwards and forwards, Volume, How loud a sound is, Waves, Vibrating particles hit adjacent particles making them move, Wavelength, Distance between peaks of a wave, which affects the frequency (and pitch) of the sound wave

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