Ice melts into water. Bread burns in a toaster. A cake bakes in an oven. Two chemicals form a new substance.
I gave my students this multiple choice question: In which case does a physical change occur?

Only one answer is correct among these 4 choices:
- Ice melts into water.
- Bread burns in a toaster.
- A cake bakes in an oven.
- Two chemicals form a new substance.

Could you tell me which one is correct?

Ice melts into water.