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Water expands when it freezes. One of the rare times things grow when they chill.

✓ TRUE FACT
Ice forms a crystal lattice that takes up more space, making ice about ~9% less dense than liquid water. That’s why ice floats and why freezing water can crack rocks, roads, and pipes.

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Water expands when it freezes. One of the rare times things grow when they chill. | SmartAss Facts