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16 Cards in this Set
- Front
- Back
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What is a reservoir? |
The part of the Biosphere that contains significant amounts of an element |
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True or false? A reservoir can act as a source and a sink |
True |
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What methods are used to measure environmental carbon and other elements? |
Chemical and spectroscopic analysis Radioisotope incorporation Stable isotope ratios |
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What is aerobic carbon cycling? |
The process in which CO2 gets fixed into biomass by photosynthesis, then reduced to biomass, and the returned to the atmosphere by respiration |
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What is the difference between anaerobic and aerobic carbon cycling? |
Aerobic has a higher rate Anaerobic occurs in the subsurface of environment and involves fermentation and lithotrophic respiration |
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This cycle is the cyclic exchange of water between the atmosphere and biosphere |
Hydrologic cycle |
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Microbial oxygen consumption creates a: |
Biochemical oxygen demand |
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What 4 levels of treatment (in order) does water go through in a water treatment facility? |
Preliminary treatment Primary treatment Secondary treatment Tertiary treatment |
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What water treatment removew solid debris from water |
Preliminary |
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What water treatment removew sediment from water |
Primary |
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What water treatment totally removes pathogens from water through the use of chemicals? |
Tertiary treatment |
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Explain the nitrogen cycle |
Nitrogen fixers make ammonium The nitrifiers use the ammonium to make nitrate Denitrifiers take the nitrate to make elemental nitrogen for the nitrogen fixers to use |
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Nitrogen fixation is catalyzed by what enzyme? |
Nitrogenase |
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Nitrate being assimilated into biomass is called what? |
Assimilatory nitrate reduction |
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Nitrate and nitrite being reduced is called what? |
Dissimilatory nitrate reduction |
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This is the study if life in the universe |
Astrobiology |
