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Unformatted text preview: plays a crucial role in the cycle. Biogeochemical Cycles – Closing Comments:
Matter is continuously recycled in the ecosphere via
● biological processes
● chemical processes
● geological processes
● physical processes
Matter can neither be created nor destroyed and Earth is a
closed system with respect to matter. The ecosphere must
make do with the limited resources that are already here. Ecosphere continuously receives solar energy, which flows
through the ecosphere providing
● warmth for the atmosphere and oceans
● energy for the hydrologic cycle
● food for living organisms via photosynthesis
Each time energy is transformed, some of it is degraded into low
quality (useless) heat.
Energy is not recycled. Key feature of biogeochemical cycles: 'bio' part, i.e. the
important role played by life itself in establishing prevailing
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This note was uploaded on 03/01/2014 for the course NATS 1840 taught by Professor None during the Fall '13 term at York University.
- Fall '13