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HYDROSPHERE (Gr. i55wp, See also: physical geography, a name given to the whole mass of the See also: water of the oceans, which fills the depressions in the See also: earth's crust, and covers nearly three-quarters of its See also: surface
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The name is used in distinction from the atmosphere, the earth's envelope of air, the lithosphere (Gr
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XLOos, See also: rock) or solid crust of the earth, and the centrosphere or interior mass within the crust
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To these " See also: spheres " some writers add, by figurative usage, the terms "biosphere,'," or See also: life-sphere, to cover all living things, both animals and See also: plants, and " psychosphere," or mind-sphere, covering all the products of human intelligence
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