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Hydrosphere
Hydrosphere (Greek hydro- means "water")
in physical geography, describes collective mass of water that is found under, on and over the surface of the Earth.
Water comprising hydrosphere is found in various forms :
- under the Earth's surface and in rocks
- in biosphere - plants and animals
- water covering the Earth's surface in liquid and solid forms (ice, snow)
- atmospheric water in clouds and water vapour
Other spheres are :
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