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In geography ,The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) factors from which they derive energy and nutrients. Before the coming of life, Earth was a bleak place, a rocky globe with shallow seas and a thin band of gases—largely carbon dioxide, carbon monoxide, molecular nitrogen, hydrogen sulfide, and water vapour. It was a hostile and barren planet. This strictly inorganic state of the Earth is called the geosphere; it consists of the lithosphere (the rock and soil), the hydrosphere (the water), and the atmosphere (the air).
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There r four spheres in our earth. Dey r lithosphere, hydrosphere, atmosphere and biosphere. The names of the four spheres are derived from the Greek words for stone (litho), air (atmo), water (hydro), and life (bio).The biosphere is all life on our planet. The biosphere includes all the things dat r living and dat r dead but not decomposed. Plants, animals,bacteria,fungi and single- celled found on the biosphere, Most of this life exists no deeper than 10 feet into the ground or 600 feet above it. 
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