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==Key Stage 2==
===Meaning===
'''Sound''' is a [[Vibrate|vibration]] that passes through the [[air]] to our [[Ear|ears]].
===About Sound===
: Sounds are caused by materials vibrating.
: Sound travels through the air because it makes the air vibrate. If there were no sound could not travel to our ears.
: Sounds can be high or low pitched.
: Sounds can be loud or quiet.