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A. Burning a piece of paper is technically called combustion. It represents a chemical reaction whereby the carbon compounds in the paper are oxidized into different chemicals like carbon dioxide and water vapor. This is a chemical change.
This would be a physical change in the shape and size of the paper. If the same piece of paper is burned, it is broken up into different substances that are not paper. Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all.f the same piece of paper is burned, it is broken up into different substances that are not paper. Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all.