The rocks would become rounded. The rocks would be used for shelter. The rocks would be moved by the wind. The rocks would break into smaller pieces.
I gave my students this multiple choice question: When cold weather freezes water in the cracks of rocks, which would most likely happen?

Only one answer is correct among these 4 choices:
- The rocks would become rounded.
- The rocks would be used for shelter.
- The rocks would be moved by the wind.
- The rocks would break into smaller pieces.

Could you tell me which one is correct?

The rocks would break into smaller pieces.