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i know that if the wind is blowing behind you your sound will go ferther

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i know that when there is wind sound can be carried a long way

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Soun is made of waves of air. sound is made when you move air quickly like an explosion is loud because the waves are quite strong and that is also why when somethoing snaps it often makes a loud sound becaus it moves the air quickly

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i know that if you shout in a valley

the sound waves will travel further

than if you were round a really hilly place

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I know that there are sound waves and that they can travel fast.

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i know that when a rush of air hits and object it will make a sound

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I know thay when something chops through the air it makes a sound

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I dont understand why some people can hear sound better than others

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I know that everyone can make a sound.

e.g Clapping, talking etc

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I know that when you bang

something together it makes a sound.

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I know that sound travels

best over a large flat place

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i know that sound can echo

through a big area

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i know that if you hit

something like drums

it makes a sound

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I don't understand why your voice breaks.

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I know sound can bounce off things.