Water

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Water is a ubiquitous chemical substance that is composed of hydrogen and oxygen and is essential for all known forms of life. Refers to the chemical compound, H2O, as well as its liquid form. At atmospheric temperatures and pressures, it can exist in all three phases: solid (ice), liquid (water), and gaseous (water vapor). It is a vital, life-sustaining part of life on earth.
Water is a ubiquitous chemical substance that is composed of hydrogen and oxygen and is essential for all known forms of life. Refers to the chemical compound, H2O, as well as its liquid form. At atmospheric temperatures and pressures, it can exist in all three phases: solid (ice), liquid (water), and gaseous (water vapor). It is a vital, life-sustaining part of life on earth.

Water is a ubiquitous chemical substance that is composed of hydrogen and oxygen and is essential for all known forms of life.

Refers to the chemical compound, H2O, as well as its liquid form.

At atmospheric temperatures and pressures, it can exist in all three phases: solid (ice), liquid (water), and gaseous (water vapor).

It is a vital, life-sustaining part of life on earth.



[edit] Residence times

Average reservoir residence times
Reservoir Average residence time
Oceans 3,200 years
Glaciers 20 to 100 years
Seasonal snow cover 2 to 6 months
Soil moisture 1 to 2 months
Groundwater: shallow 100 to 200 years
Groundwater: deep 10,000 years
Lakes 50 to 100 years
Rivers 2 to 6 months
Atmosphere 9 days


[edit] Also See

[edit] References

  • Water Wiki [1]

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