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SCI 245 Study of Earth CP WK 1

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The four subsystems of the earth include the lithosphere, biosphere,
atmosphere, and hydrosphere. All of the subsystems are required to
work and interact with each other. The materials in all subsystems
are constantly being exchanged.
The lithosphere is known as the Earth's outer layer, which acts as a
crust and is rocky. As plants grow, they transfer nutrients from the
lithosphere into the biosphere. The lithosphere is connected to the
water cycle, along with the hydrosphere, and is important for
functioning the water cycle.
The biosphere is made of living organisms on the Earth, and some
dead. As the plants grow old and eventually deteriorate, the
material found in plants may enter the atmosphere, while the
material that has not been decomposed remains in the lithosphere.
This subsystem, along with the atmosphere, is needed for
photosynthesis, in which plants and people are depended on.
The atmosphere is made up of gases surrounding the Earth, which
acts as an envelope. Rocks form and leave the minerals that they
produce behind. As lakes dissolve, they return these minerals to the
lithosphere. People depend upon the atmosphere for minerals.
The hydrosphere is made up of the water and liquids that has been
collected from the Earth's surface and underground areas. While
rocks form, the minerals that they contain, such as salts, remain in
the hydrosphere. The relationship between the hydrosphere and the
biosphere is depended upon by animals that need water to survive.

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