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Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

7. Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

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The burning of wood is a chemical change because wood after burning gives carbon dioxide, ash, heat, water vapour also it is an irreversible process.

Whereas cutting wood into small pieces is a physical change because the original composition of wood remains the same and no new substance is formed.

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