1. Biogeochemical Cycles

2. Transpiration is the release of water from plants. precipitation condensation transpiration evaporation water storage in ocean surface runoff lake groundwater Seepage or percolation

3. Oxygen cycles indirectly through an ecosystem by the cycling of other nutrients. oxygen respiration carbon dioxide photosynthesis

4. Carbon is the building block of life

5. A = carbon dioxide in air B = photosynthesis C = producers D = respiration E and F = consumption

6. G = cellular respiration H = death I = bacteria J = decay releases CO 2 K = fossil fuels produced L = refinery M = combustion/burning of fossil fuels N = burning releases CO 2 O = fires release CO 2 P = CO 2 absorbed into water

7. Nitrogen cycle: important for proteins, DNA

8. A = atmospheric nitrogen B = nitrogen fixation = nitrogen converted to ammonia C = legumes (peas, peanuts, beans, alfalfa) D = bacteria E = ammonification = ammonia created from waste or decay

9. F = nitrification = nitrates formed from ammonia G and H = bacteria I = plants use nitrates to make protein J = animals eat plants or animals to get protein K = denitrification = bacteria convert nitrates to nitrogen gas

10. Phosphorus cycle

11. A = erosion B = uptake by plants C = concentration in plant tissue D, E = consumption F, G = waste

12. H = runoff I = sediment J = geologic uplifting