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Ecosystem
All of the interacting parts of a biological community and its environment either abiotic or biotic.
E.G Rainforest, Lake, Arctic, Desert
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Sustainable Ecosystem
An ecosystem that can survive and support a variety of organisms and can keep supporting them for a long time.
E.g. A lake ecosystem that has an equal level of fish living and dying every year.
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Biotic
- The living parts of
- an ecosystem.
E.g. Animals, plants, insects, bacteria.
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Abiotic
- The non-living parts
- of an ecosystem.
E.g. Soil, water, sunlight, temperature.
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Lithosphere
The rocky, hard part of the Earth's surface. 
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Hydrosphere
- All of the water found on Earth, including lakes, oceans, and groundwater.
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Atmosphere
A layer of gases above the surface of the Earth.
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Biosphere
The regions of Earth where living organisms exist.
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