A piece of metal is cut in half. An ice cube melts on a counter. A camper roasts marshmallows over a burning fire. A baker mixes together flour and sugar to make dough.
Missy and Ethan discussed examples of the types of changes in matter. In which example is a chemical change taking place?

Options:
- A piece of metal is cut in half.
- An ice cube melts on a counter.
- A camper roasts marshmallows over a burning fire.
- A baker mixes together flour and sugar to make dough.

A camper roasts marshmallows over a burning fire.