Question

How many spheres are there on Earth ? Which are they?​

Answer 1

Answer:

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).

Answer 2

Answer:

Earth's Systems - Biosphere, Hydrosphere, Atmosphere, Geosphere, Cryosphere. This environmental science lesson and activity is a quick and easy introduction to the earth's spheres: geosphere, hydrosphere, biosphere, and atmosphere. A brief introduction to the cryosphere is also included.

Explanation:

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