The Hydrosphere is the mixed mass of water found on, under, and also over the surface of a planet, small earth or natural satellite. It has been approximated that there are 1386 million cubic kilometers of water on Earth.This includes water in fluid and also icy types in groundwater, oceans, lakes as well as streams. Deep sea make up 97.5% of this amount. Fresh water make up only 2.5%. Of this fresh water, 68.7% remains in the form of ice and also permanent snow cover in the Arctic, the Antarctic, and also mountain glaciers. 29.9% remains in the kind of fresh groundwater. Only 0.26% of the fresh water in the world remains in easily accessible lakes, reservoirs and also river systems.The complete mass of the Earth’s hydrosphere is about 1.4 × 1018 tonnes, which is about 0.023% of Earth’s overall mass. Regarding 20 × 1012 tonnes of this is in Earth’s environment (for practical objectives, 1 cubic meter of water considers one tonne). Around 75% of Earth’s surface area, a location of some 361 million square kilometers (139.5 million square miles), is covered by ocean. The typical salinity of Earth’s oceans has to do with 35 grams of salt each kilogram of sea water (3.5%). Click here for Quiz on Biosphere
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