a rusting car fender a spinning top a spilled bucket of water a melting popsicle
I gave my students this multiple choice question: Which is an example of a chemical change?

Only one answer is correct among these 4 choices:
- a rusting car fender
- a spinning top
- a spilled bucket of water
- a melting popsicle

Could you tell me which one is correct?

a rusting car fender