ENV100H1 Lecture Notes - Lecture 7: Water Cycle, Nitrogen Cycle, Nitrogen Fixation

• School: UTSG
• Department: School of Environment
• Course: ENV100H1
• Professor: Karen Ing

Document Summary

Carbon atom in dinosaurs can be part of carbon complement in your own body (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Largest pool of water on the planet is in the oceans. Cycle in the v fundamental level of the hydrologic cycle goes from ocean to atmosphere to land to ocean (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Falls to ground as precipitation but ultimately goes back to ocean. 78% atmosphere composed of nitrogen abundance but not easily available for biological life has to go through five steps before available for use and consumption nitrogen fixation nitrification assimilation (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) ammonification denitrification. Lightning can split n2 in atmosphere and make it available for use. Nature has evolved a way to access atmospheric nitrogen to make it biologically available (cid:1) Specilizaed bacteria in nodules of leguminous plants, splits atmosphere nitrogen and combines it with h2 (cid:1)