Chemical changes involve creating new substances like burning a candle, frying an egg, and making coffee, while physical changes like boiling alcohol and melting an ice cube involve state changes without forming new substances.
Chemical changes, characterized by the formation of new substances, include burning a candle, frying an egg, and making coffee. On the other hand, boiling alcohol and melting an ice cube are examples of physical changes where the substances undergo a change in state without forming new substances.
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