Phosphorus and Nitrogen Cycle

tagasufe's version from 2015-04-27 14:20

Terrestrial Phosphorus Cycle

Question Answer
No Gas phase means it movesslowly
The Phosphorus CycleSTEP ONE phosphate in rocks, STEP TWO erosion of rocks releases phosphates (PO4 3-) components, STEP THREE Plants use the phosphorus compounds to construct molecules they need, STEP FOUR Animals consume plants STEP FIVE animals and plants decompose and phosphorus and phosphates go into the soil and rocks, END OF CYCLE

Aquatic Cycle

Question Answer
The Aquatic Phosphorus CyclePhosphates from dead marina animals are depositied to the floor as sediment, STEP TWO, sediments become rock and part of the sea floor, STEP THREEE erosion/mining release phosphate compounds from the sea floor, STEP FOUR phophates are taken in by animals to make bones, cycle starts over

Human Intervention

Question Answer
Three Things causing climate changeDigging and Mining, Clear cutting and removing vegetation, overuse of fertilizers and other products which contain large concentrations of phosphorus
Mining and Digginghumans dug and mine for phosphates to use as fertilizers and detergents using toxic chemicals, destroys landscape and causes P runoff
Clear Cutting and removing vegetationwhen forests are burn/cut, the remaing P in the soil is washed away by rain leaving unproductive land.
Eutrophicationcauses explosive algae/cyanobacteria growth, block sunlight from plants on bottom, plants decay, aerobic bacteria that needs oxygen pulls it from water and decomposes plants, not enough oxygen, fish die, creates a dead zone

Nitrogen Cycle

Question Answer
Which organic compounds does Nitrogen make up?amino acids, proteins, nucleic acids (DNA RNA).
How much of the troposphere does nitrogen take up?78%
What two things convert N2 gas into usable nitrogen compounds?bacteria and lightning
What are the Steps in the nitrogen cycle ?nitrogen fixation, nitrification, assimilation, ammonification, denitrifcation (ned flanders neighbor always accepts donuts)
Nitrogen Fixationcyanobacteria in soil and rhizobiom bacteria convert nitrogen in the atmosphere to ammonia (n2+ 3H2 -> 2NH3 ) Plants can use ammonia or ammonium
Nitrificationmost of ammonia in soil converted by aerobic bacteria to nitrite ions which is toxic to plants. Then, nitrite is converted to nitrate ions which plants an easily take up as a nutrient
Assimilationplants absorb ammonia and nitrate ions and make nitrogen containing compounds including proteins and nucleic acids
AmmonificationDecomposer Bacteria break apart and nitrogen compounds into ammonia
Denitrificationaerobic bacteria converts ammonia into nitrite and nitrate. anaerobic bacteria convert nitrate/nitrite back into nitrogen gas and the cycle starts over
Human Intervention in the nitrogen cycleacid rain nitric acid, fertilizer run off causes eutrophication which casuses dead bodies of water
Acid Rainburn fuel that release nitric oxide. NO reacts with oxygen to form NO2, which reacts with water vapor to form HNO3, nitric acid leads to acid rain