Question

why is cutting of wood into peice and burning wood considered as two different types of change

Answer 1

because cutting of wood is physical change
but burning is chemical change.
hence they bought are considered two different types of change

Answer 2

Burning of wood is a chemical change because in burning new substances are formed as

Wood + Oxygen —> Charcoal + Carbon dioxide + Heat + Light 

But cutting it into small pieces is physical change because no new substance is formed. We can only reduce the size of wood.

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