fog rising off a river wood burning in a fireplace ice cream melting in the sunshine grinding peppercorn into pepper flakes
I gave my students this multiple choice question: Which event is an example of a chemical change?

Only one answer is correct among these 4 choices:
- fog rising off a river
- wood burning in a fireplace
- ice cream melting in the sunshine
- grinding peppercorn into pepper flakes

Could you tell me which one is correct?

wood burning in a fireplace