Question

explain why burning of wood and cutting it into small pieces is considered as two different types of changes

Answer 1

bcoz burning wood is a chemical change whereas cutting it is a physical change as no chemical reaction takes place. the physics properties remains same... wood gets converted into ash when burned. chemical properties are changed..


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Answer 2

Answer:

Burning of wood is a chemical change because in burning new substances are formed with the evolution of heat and light and carbon dioxide gas.

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.