cycles of matter notes

energy flows in…

1 direction

water cycle: transpiration

leaf to atmosphere

CO2 is removed from atmosphere by

dissolving in ocean; photosynthesis; dead things turn to coal and oil

CO2 is added to atmosphere by… (naturally)

respiration; volcano eruption

CO2 is added to atmosphere by… (human)

burning fossil fuels; burning forests

how can nitrogen become usable

fixed by bacteria, sometimes by lightning

nitrogen is added to geo, hydrosphere by

nitrogen fixation, dissolving in ocean, fertilizer

nitrogen gets back to atmosphere when

plants die and the nitrogen goes back through “denitrofication”

where is phosphorus

geosphere, hydrosphere, never atmosphere

CHONP?

nucleic acid

excess phosphorus comes from…

fertilizer