It boils. It melts. It dissolves. It evaporates.
I gave my students this multiple choice question: A student mixes a teaspoon of sugar in a large glass of water. What happens to the sugar when it is mixed with the water?

Only one answer is correct among these 4 choices:
- It boils.
- It melts.
- It dissolves.
- It evaporates.

Could you tell me which one is correct?

It dissolves.