Water expands when it freezes. Water forms droplets as it falls. Water turns into a gas when it boils. Water takes the shape of its container.
I gave my students this multiple choice question: Which statement describes a property of water that most likely causes large rocks to break apart?

Only one answer is correct among these 4 choices:
- Water expands when it freezes.
- Water forms droplets as it falls.
- Water turns into a gas when it boils.
- Water takes the shape of its container.

Could you tell me which one is correct?

Water expands when it freezes.