Biosphere

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[bi-oh-sfeer]
A sphere that contains all living things on Earth and the environments that support them; one of the four spheres on Earth.  An ecological level of organization.

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  • Glossary: Sphere
    An independent part of the system that is interconnected to other spheres by cycles and processes. The four spheres on Earth include the atmosphere, biosphere, geosphere, and hydrosphere.
  • Glossary: Biogeochemical Cycle
    The pathway that matter cycles through the biosphere. This term is the contraction that stands for biological, geological, and chemical.
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