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2014-10-07T20:02:22+08:00

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Chemical change- there is a new substance formed and you can never get it back the same thing you had it (ex. burning/combustion) and also there is a change in chemical composition

physical change- there is a change only in physical composition and you can bring it back the same way you had it (ex. melting) and there is no new substance formed
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2014-10-07T21:27:31+08:00

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chemical change cannot be returned to it's original form example you burn a paper so the paper turned into ashes so it is not a paper now it is now turned into ashes while physical change can be back to it's original form example you tear a piece of paper it still a paper.
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