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Water: Essential States and Cycle

Water exists in three states: solid ice, liquid water, and gas water vapor. It is colorless, odorless, and tasteless, but is essential for all life as the main component of Earth's bodies of water, including oceans, seas, lakes, rivers, and the fluids of living things. With the chemical formula H2O, a water molecule contains one oxygen atom bonded to two hydrogen atoms. Water moves continuously through the global water cycle of evaporation, condensation, precipitation, and runoff between the oceans, atmosphere, and land.

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Saad Ahsan
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136 views1 page

Water: Essential States and Cycle

Water exists in three states: solid ice, liquid water, and gas water vapor. It is colorless, odorless, and tasteless, but is essential for all life as the main component of Earth's bodies of water, including oceans, seas, lakes, rivers, and the fluids of living things. With the chemical formula H2O, a water molecule contains one oxygen atom bonded to two hydrogen atoms. Water moves continuously through the global water cycle of evaporation, condensation, precipitation, and runoff between the oceans, atmosphere, and land.

Uploaded by

Saad Ahsan
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Water in two states: liquid (including the clouds, which are examples of aerosols), and solid (ice).

Water is a transparent, tasteless, odorless, and nearly colorless chemical substance, which is the
main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms. It is
vital for all known forms of life, even though it provides no calories or organicnutrients. Its chemical
formula is H2O, meaning that each of its molecules contains one oxygen and two hydrogen atoms,
connected by covalent bonds. Water is the name of the liquid state of H2O at standard ambient
temperature and pressure. It forms precipitation in the form of rain and aerosols in the form
of fog. Clouds are formed from suspended droplets of water and ice, its solid state. When finely
divided, crystalline ice may precipitate in the form of snow. The gaseous state of water
is steam or water vapor. Water moves continually through the water
cycle of evaporation, transpiration (evapotranspiration), condensation, precipitation, and runoff,
usually reaching the sea.
Water covers 71% of the Earth's surface, mostly in seas and oceans.[1] Small portions of water occur
as groundwater (1.7%), in the glaciers and the ice caps of Antarctica and Greenland (1.7%), and in
the air as vapor, clouds (formed of ice and liquid water suspended in air),
and precipitation (0.001%).[2][3]

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