Physical Change:
* Melting an ice cube: The ice cube changes from a solid to a liquid, but the chemical composition (H₂O) remains the same. This is a change in state, not a change in the substance itself.
Chemical Change:
* Burning a piece of wood: The wood reacts with oxygen in the air, producing ash, smoke, and gases like carbon dioxide. This is a change in the chemical composition of the wood, creating new substances.
Key Differences:
* Physical changes are temporary and reversible. You can freeze water back into ice.
* Chemical changes are permanent and irreversible. You can't easily change the ash back into wood.
Let me know if you'd like more examples!
