Does a Full Bucket of Water Freeze into a Full Bucket of Ice?

No, it doesn’t. Although most substances shrink when they change from a liquid to a solid, this is not true of water. When water freezes, it expands, or gets bigger, actually one-tenth bigger. So nine buckets of water freeze into ten buckets of ice.

This explains why water pipes sometimes burst when temperatures are below freezing. It also explains why water that is resting in cracks of rocks sometimes causes the rocks to crack and break when the temperature is below freezing.