Step-by-step explanation:
Earth is a system with systems inside of it.
You may know things like how to earth rotates and orbits around the sun this is a system. Earth itself has many other ones such as atmospheric systems like the carbon cycle, water cycle and soil cycle. It also includes different parts of itself that do different things like the geosphere, hydrosphere, biosphere and atmosphere. And they are just like what they seem, geo is the ground and core, hydro is water and ocean, bio is plants and animals and atmos is the air we breathe.
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