A different state of matter is produced. Some mass is converted to energy. Some form of light is given off. A new material is formed.
I gave my students this multiple choice question: Which of the following is a characteristic of all chemical changes?

Only one answer is correct among these 4 choices:
- A different state of matter is produced.
- Some mass is converted to energy.
- Some form of light is given off.
- A new material is formed.

Could you tell me which one is correct?

A new material is formed.