Ice is water frozen into a solid state. Depending on the presence of impurities such as particles of soil or bubbles of air, it can appear transparent or a more or less opaque bluish-white color.

In the Solar System, ice is abundant and occurs naturally from as close to the Sun as Mercury to as far as the Oort cloud. Beyond the Solar System, it occurs as interstellar ice. It is abundant on Earth's surface  particularly in the polar regions and above the snow line  and, as a common form of precipitation and deposition, plays a key role in Earth's water cycle and climate. It falls as snowflakes and hail or occurs as frost, icicles or ice spikes.

Ice molecules can exhibit up to sixteen different phases (packing geometries) that depend on temperature and pressure. When water is cooled rapidly (quenching), up to three different types of amorphous ice can form depending on the history of its pressure and temperature. When cooled slowly correlated proton tunneling occurs below 20 K giving rise to macroscopic quantum phenomena. Virtually all the ice on Earth's surface and in its atmosphere is of a hexagonal crystalline structure denoted as ice Ih (spoken as "ice one h") with minute traces of cubic ice denoted as ice Ic. The most common phase transition to ice Ih occurs when liquid water is cooled below 0°C (273.15K, 32°F) at standard atmospheric pressure. It may also be deposited directly by water vapor, as happens in the formation of frost. The transition from ice to water is melting and from ice directly to water vapor is sublimation.

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Latest News for: Discovery water


Shell starts production on Gulf of Mexico Appomattox platform ahead of schedule

The Advocate 23 May 2019
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The Collision that Created the Moon Might Have Also Brought Water to the Early Earth

Universe Today 23 May 2019
Their discovery shows that Earth’s water is much more ancient than previously thought....

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IFL Science 23 May 2019
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Northern Colorado summer starts with outdoor swimming

The Tribune Greeley 23 May 2019
With schools preparing to close for summer vacation, outdoor swimming pools, water parks and lakes are opening offering splash-filled fun for the entire family ... For more information on pools and water parks in Greeley, visit ... Discovery Bay Waterpark. Greeley Residents swim at the Discovery Bay Water Park in this Tribune file photo....

Ford focuses on masonry work in second phase of construction at Michigan Central Depot

Detroit news 23 May 2019
Since the start of the first phase in December, Ford has taken numerous steps to minimize water from entering and remaining in the 640,000-square-foot structure ... Black tubing runs along the walls and from floor to floor directing water out and away from the building ... At some points, the water level had risen to between six to eight feet high....

Shell starts production at Appomattox in the Gulf of Mexico

The Record 23 May 2019
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Polka music, Reymont and Memorial Day?

The Am-Pol Eagle 23 May 2019
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Trudeau expected to announce new Coast Guard vessels for Arctic in Vancouver

CTV 22 May 2019
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Microsoft Calls for GDPR-Like Framework for US Data

WhoWhatWhy 22 May 2019
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Deccan Herald 22 May 2019
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