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Water

A liquid essential for life

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A Quick Tip by Sharrie

  • Aug 12, 2010
It is highly essential for life forms but it can also kills when too much of it invades a city in the form of rains, floods and mudslides. Quite amazing, isn't it?
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Sharrie ()
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I'm a traveler at heart & have been nicknamed Travel Queen by friends & colleagues alike. Traveling has been my life passion for the last decade or so. As we enter a new decade, I'm excited … more
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Wiki

Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, andgaseous state, water vapor or steam.

Water covers 70.9% of the Earth's surface,[1] and is vital for all known forms of life.[2] On Earth, it is found mostly in oceans and other large water bodies, with 1.6% of water below ground in aquifers and 0.001% in the air as vaporclouds (formed of solid and liquid water particles suspended in air), and precipitation.[3] Oceans hold 97% of surface water, glaciers and polar ice caps 2.4%, and other land surface water such as riverslakes and ponds 0.6%. A very small amount of the Earth's water is contained within biological bodies and manufactured products.

Water on Earth moves continually through a cycle of evaporation or transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land.

Clean drinking water is essential to human and other lifeforms. Access to safe drinking water has improved ...

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Physics, Chemicals, Life Essentials

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