Explain why burning of wood and cutting it into small pieces are considered as two different types of changes
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Burning of wood is a chemical change while cutting of wood is a physical change because during burning, new substances are formed .
- After burning, we cannot get original substance, (i.e. wood) back .
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When we burn wood a new substance is formed. Therefore it is a chemical change.
However when we cut wood , only the shape and size of the wood is change. No new substance is formed . Therefore it is a physical change .
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