Cold, colder and coldest ice

Electric charge can change the temperature at which water freezes.

By Stephen Ornes, 00:00 AM February 25, 2010

Most people know what happens at 0º Celsius (or 32 º Fahrenheit): Water freezes. When the temperature outside is below freezing, for example, a rain storm may become a blizzard of snow. A glass of water left in the freezer eventually becomes a glass of ice.

 

The freezing point of water may seem like a simple fact, but the story of how water freezes is a little more complicated. In water at the freezing temperature, ice crystals usually form around a dust particle in the water. Without dust par...

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