Question

explain why burning of wood and cutting it into small pieces are considered as two different types of change
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Answer 1

In burning of wood, new substances are formed and hence it is a chemical change. While cutting the wood into small pieces no new substance is formed, thus it is a physical change. Hence, burning of wood and cutting it into small pieces are considered as two different types of changes.

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Answer 2

Burning of Wood

In this process, the composition of wood changes i.e., conversion of wood into ash, which is a chemical change and it cannot be recycled.

Cutting Of Wood

In this process, only shape of wood changes and the chemical composition remains the same so It is a physical change.