| − | '''Ice''' is the [[solid]] phase of [[water]]. At one atmosphere of [[pressure]], ice melts at 32 degrees [[Fahrenheit]] (0 degrees [[Celsius]]). There are up to 17 different kinds, or ''phases'', of ice, but the only type found in abundance on earth is known as ''Ice I<sub>h</sub>''.<ref>''See'', ''e''.''g''. New York University, [http://www.nyu.edu/pages/mathmol/txtbk2/topic7.htm About Water and Ice]; Martin Chaplin, [http://www1.lsbu.ac.uk/water/ice1h.html Hexagonal Ice (Ice Ih) structure]</ref> | + | '''Ice''' is the [[solid]] phase of [[water]]. At one atmosphere of [[pressure]], ice melts at 32 degrees [[Fahrenheit]] (0 degrees [[Celsius]]). There are more than 17 different kinds, or ''phases'', of ice,<ref>''See'' Martin Chaplin, [http://www1.lsbu.ac.uk/water/ice.html The ice phases of water]</ref> but the only type found in abundance on earth is known as ''Ice I<sub>h</sub>''.<ref>''See'', ''e''.''g''. New York University, [http://www.nyu.edu/pages/mathmol/txtbk2/topic7.htm About Water and Ice]; Martin Chaplin, [http://www1.lsbu.ac.uk/water/ice1h.html Hexagonal Ice (Ice Ih) structure]</ref> |
| | Due to the nature of its crystalline structure, ice is slightly less dense than liquid water, causing it to float. | | Due to the nature of its crystalline structure, ice is slightly less dense than liquid water, causing it to float. |