AP EXAM REVIEW QUIZ #1 : BIOGEOCHEMICAL CYCLES Flashcards Preview

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Flashcards in AP EXAM REVIEW QUIZ #1 : BIOGEOCHEMICAL CYCLES Deck (12):
1

what happens during nitrogen fixation?

nitrogen wastes are covered by bacterium into ammonium

2

in what ways have humans had an effect in the nitrogen cycle?

1. use of fertilizers
2.combustion of fossil fuels

3

anaerobic respiration

end product methane

4

ammonification

when specialized aerobic bacteria covert most of the ammonia in the sol into nitrate ions

5

nitrogen fixation

when specialized bacteria in the soil convert gaseous nitrogen into ammonia

6

aerobic respiration

bacteria use oxygen to convert organic nutrients back into carbon dioxide

7

concentrations of gases in dry air?

co2:

8

PHOSPHORUS CYCLE

-phosphorus is not necessary for living organisms
-generally found in rocks, sediment and soil
-phosphorus does not exist in the atmosphere as a gas
-mined from rocks, processed and then added to commercial inorganic fertilizers
-major source on land: compounds realizes by weathering rock
-major component in biological molecules such as proteins
-upwellings bring phosphate from seafloor rocks up back into the terrestrial cycle

eutrophication: a body of water achieves excess nutrients (phosphate) and can cause an overgrowth of algae and deplete the water of oxygen (algae blocks sunlight)

9

all cycle can be...?

altered dramatically by humans

10

CARBON CYCLE

two main processes: respiration and photosynthesis

-travels though food chains by carbohydrates from plants which then returns to the atmosphere by
bodies of consumers decompose into soil OR bodies eventually become part of a fossil fuel and is burned

-carbon sinks include forests and oceans
-reservoirs of co2
1. oceans: co2 soluble in water and algae photosynthesizes
2. rocks: calcium carbonate
3. fossil fuels

11

SULFUR CYCLE

-one of the components that makes up proteins and vitamins (MAKES IT NECESSARY FOR ORGANISMS)
-mostly found in rocks or salts deep in the ocean and in atmosphere (naturally or through volcanic eruptions and decaying of organisms)

12

NITROGEN CYCLE

-found in dna,rna,amino acids
-used in fertilizers
-too much in environment=loss of biodiversity
example: discharge from sewage=harm to marine life