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Molecules in all states of matter have a Kinetic Energy that is proportional to temperature.

As water is cooled, that Kinetic Energy, the translation, rotational and vibrational, decreases.

When water reaches 0 degrees C at normal pressure, the Kinetic Energy remains constant as freezing proceeds.

Removing more heat energy decreases the potential energy of the molecules by changing their positions relative to one another. Attractive forces between molecules move them into preferred positions which are identical for every molecule. In the process a pattern emerges and a regular array of molecules is assembles in the crystalline structure we know as ice.

Unlike most other substances, this rearrangement of water keeps the molecules further apart than the average separation in the liquid. That is why ice floats, it has a lower specific gravity (density) than liquid water.

Who ever answered this is dumb because this is wrong;D

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10y ago

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