Final answer:
A fire is a physical change as it alters the state or appearance without changing the chemical composition, while chemical changes involve the formation of new substances with different properties.
Explanation:
A fire is an example of a physical change because during a fire, the substances are undergoing a change in state or appearance without altering their chemical composition. For instance, when wood burns, it turns into ash and smoke, but the chemical composition of the wood remains the same.
On the other hand, a chemical change involves a reorganization of atoms to form new substances with different chemical properties. Examples of chemical changes include burning a candle, where wax changes into carbon dioxide and water, creating new chemical compounds.
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