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Environmental Science
Earth Systems and Resources
APES 1: Biogeochemical Cycles
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Environmental Science
Earth Systems and Resources
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20 Terms
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1
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Movement of atoms
________ and molecules containing the element carbon between sources and sinks.
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movement of matter
Involve the ________ via biological, chemical, and geological processes.
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Decomposition
________: storage of carbon over millions of years.
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Phosphorus
________ is naturally scarce in aquatic & terrestrial ecosystems- limiting factor.
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Movement of atoms
________ and molecules containing nitrogen between sources and sinks.
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Movement of atoms
________ and molecules containing phosphorus between sources and sinks.
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decomposition
storage of carbon over millions of years
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nitrogen fixation
the process in which atmospheric nitrogen is converted into a form of N (usually ammonia) that is available for uptake by plants
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phosphorus is naturally scarce in aquatic & terrestrial ecosystems
limiting factor
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hydrologic (water) cycle
movement of water between sources and sinks
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biogeochemical cycles
involve the movement of matter via biological, chemical, and geological processes
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carbon cycle
movement of atoms and molecules containing the element carbon between sources and sinks
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nitrogen cycle
movement of atoms and molecules containing the element nitrogen between sources and sinks
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phosphorus cycle
movement of atoms and molecules containing phosphorus between sources and sinks
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7 processes that drive the carbon cycle
photosynthesis, respiration, exchange, sedimentation, burial, extraction, and combustion
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processes that drive the water cycle
precipitation, evapotranspiration, runoff, percolation, absorption, groundwater flow
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processes that drive the nitrogen cycle
nitrogen fixation, nitrification, denitrification, decomposition
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processes that drive the phosphorus cycle
phosphatizing bacteria, decomposition, bone deposits, weathering
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sink
anything that absorbs more of the biogeochemical substance than it releases (ex. for the carbon cycle: plants, ocean, soil)
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source
anything that releases more of the biogeochemical substance than it absorbs (ex. burning fossil fuels, volcanic eruptions)