move farther apart. vibrate rapidly. flow more randomly. gradually expand.
I gave my students this multiple choice question: As water cools to a temperature of zero degrees Celsius and forms ice, water molecules tend to

Only one answer is correct among these 4 choices:
- move farther apart.
- vibrate rapidly.
- flow more randomly.
- gradually expand.

Could you tell me which one is correct?

move farther apart.