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Waterand clouds are condensed water vapor.Water is a common chemical substance that is essential to all known forms of life.In typical usage, water refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor. About 1,460 teratonnes of water covers 71% of the Earth's surface, mostly in oceans and other large water bodies, with 1.6% of water below ground in aquifers and 0.001% in the air as vapor, clouds , and precipitation. Some of the Earth's water is contained within man-made and natural objects near the Earth's surface such as water towers, animal and plant bodies, manufactured products, and food stores.Saltwater oceans hold 97% of surface water, glaciers and polar ice caps 2.4%, and other land surface water such as rivers and lakes 0.6%. Water moves continually through a cycle of evaporation or transpiration , precipitation, and runoff, usually reaching the sea. Winds carry water vapor over land at the same rate as runoff into the sea, about 36 Tt per year. Over land, evaporation and transpiration contribute another 71 Tt per year to the precipitation of 107 Tt per year over land. Some water is trapped for varying periods in ice caps, glaciers, aquifers, or in lakes, sometimes providing fresh water for life on land. Clean, fresh water is essential to human and other life. However, in many parts of the world - especially developing countries - it is in short supply. Water is a solvent for a wide variety of chemical substances. (From the Wikpedia article Water.) Download PDFImage ResultsLoading...
BioPortfolio Ltd. offers e-mail and postal lists for Water scientists - we have details of around 40525 individuals working on Water . This page has been viewed 124 times Browse BioPortfolio's InDepth service - alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z or by Most Publications, recently searched for, or most viewed. Search for Water across BioPortfolio, or bestselling Water books or recently published Water books . Wikipedia excerpt, where present, licenced under the GNU Free Documentation License. Resources from the NCBI applied. Selected MeSH subject headings created and maintained by the US NLM are used in conjunction with additional keywords. 2006-2008 MeSH. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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