Question

Write a brief note on various spheres of the earth

Answer 1

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air). Each of these four spheres can be further divided into sub-spheres. To keep things simple in this course, there will be no distinction among the sub-spheres of any of the four major spheres.
1. Lithosphere - Earth (Weeks 2,3,4)
2. Biosphere - Living Things (Weeks 5,6,7)
3. Hydrosphere - Water(Weeks 8,9,10)
4. Atmosphere - Air (Weeks 11,12,13)

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