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The document outlines the four main subsystems that make up the Earth's system: the geosphere, hydrosphere, atmosphere, and biosphere. The geosphere includes all rocks and materials that make up the planet from the interior to mountain peaks and beaches. The hydrosphere contains all of Earth's liquid and gaseous water both above and below the surface. The atmosphere is the gaseous layer surrounding the Earth that is held in place by gravity and receives energy from the sun. The biosphere is the narrow zone on the Earth's surface where soil, water, and air combine to sustain life.









