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

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Solution

When we burn wood, it turns into ashes which is a new substance and the process is irreversible one, hence it is a chemical change. While cutting the wood into small pieces no new substance is formed. It is a physical change.

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

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