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→About Sound
===About Sound===
: '''Sounds''' are caused by materials [[Vibration|vibrating]].
: '''Sound''' has to travel through a [[medium]]. If there is no [[medium]], [[sound ]] cannot get form one place to another.: '''Sound''' travels through the [[air ]] because it makes the air [[Vibration|vibrate]]. If there were no air sound could not travel to our ears.
: '''Sounds''' can be high or low pitched.
: '''Sounds''' can be loud or quiet.