Earth's Spheres and Interactions

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Atmosphere

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The relatively thin envelope of gases that forms Earth's outermost layer.

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Hydrosphere

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All of Earth's water, including the water that cycles through the atmosphere.

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Biosphere

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The parts of Earth that contain all living organisms.

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Cryosphere

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The frozen part of the hydrosphere (all frozen water on Earth).

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Geosphere

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Earth's solid metal inner core, the liquid metal outer core, and the rocky mantle/crust (all hard parts of Earth).

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Feedback

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When a system returns, or feeds back energy into itself, that energy results in change.

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System

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A group of parts that work together as a whole.