Question

How many spheres are there on earth? Which are they?
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Answer 1

Answer:

There are four spheres of earth including hydrosphere, biosphere, lithosphere and atmosphere.

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Answer 2

Answer:

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.

Explanation:

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