The molecules in ice have more energy than the molecules in liquid water. The molecules in ice contain different atoms than the molecules in liquid water. The molecules in ice have more electric charge than the molecules in liquid water. The molecules in ice are less free to move than the molecules in liquid water.
I gave my students this multiple choice question: Which statement about the molecules in ice and the molecules in liquid water is correct?

Only one answer is correct among these 4 choices:
- The molecules in ice have more energy than the molecules in liquid water.
- The molecules in ice contain different atoms than the molecules in liquid water.
- The molecules in ice have more electric charge than the molecules in liquid water.
- The molecules in ice are less free to move than the molecules in liquid water.

Could you tell me which one is correct?

The molecules in ice are less free to move than the molecules in liquid water.