EVERYDAY SCIENCE

Detailed explanation-1: -The burning of wood is a chemical change as it leads to the formation of new substances like Carbon dioxide gas, water vapour, ash, etc.

Detailed explanation-2: -combustion-Kids | Britannica Kids | Homework Help. Log burning in a fire. Burning wood is an example of a chemical reaction in which wood in the presence of heat and oxygen is transformed into carbon dioxide, water vapour, and ash.

Detailed explanation-3: -The burning of wood leads to the formation of new substances like ash(carbon), carbon dioxide gas, water vapour, heat and light. This change is irreversible and hence a chemical change. While cutting wood into smaller pieces is a physical change as there is no change in the original composition of wood.

Detailed explanation-4: -Cutting of wood into small pieces is a irreversible physical change as no new substance is formed and there is no change in chemical composition of wood. Whereas, burning of wood is a chemical change as a new substance is formed.

Detailed explanation-5: -When wood is burned, oxygen and other elements in the air (mainly carbon, hydrogen and oxygen) react to form carbon dioxide that is released into the atmosphere, while the minerals turn into ashes.