Flashcards in AP EXAM REVIEW QUIZ #1 : BIOGEOCHEMICAL CYCLES Deck (12):
what happens during nitrogen fixation?
nitrogen wastes are covered by bacterium into ammonium
in what ways have humans had an effect in the nitrogen cycle?
1. use of fertilizers
2.combustion of fossil fuels
end product methane
when specialized aerobic bacteria covert most of the ammonia in the sol into nitrate ions
when specialized bacteria in the soil convert gaseous nitrogen into ammonia
bacteria use oxygen to convert organic nutrients back into carbon dioxide
concentrations of gases in dry air?
-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)
all cycle can be...?
altered dramatically by humans
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
-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)