The molecules will begin to move slower. The molecules will begin to move faster. The molecules will begin to increase in density. The molecules will begin to condense in the air.
I gave my students this multiple choice question: An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?

Only one answer is correct among these 4 choices:
- The molecules will begin to move slower.
- The molecules will begin to move faster.
- The molecules will begin to increase in density.
- The molecules will begin to condense in the air.

Could you tell me which one is correct?

The molecules will begin to move faster.