Chapter 3 Biogeochemical Cycles

Chapter 3 Biogeochemical Cycles - Chapter 3 Science...

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Chapter 3 – Science – Biogeochemical Cycles Major Questions: 1. What are the primary ways that water cycles between the atmosphere and earth’s surface. What is the differences between transpiration and evaporation? 2. What are the main fluxes in the carbon cycle? 3. Why does a relatively small flux of carbon (due to fossil fuel combustion) matter when compared to large productivity and decomposition fluxes? 4. What factors control atmospheric CO2 concentrations 5. What is N fixation and who does it? 6. Why is the N cycle changing? What are the main causes of this change? 7. How is P used by humans? What are the pollution and sustainability issues associated with this cycle? 8. What are the reactive forms of S in the atmosphere? 9. For all the cycles, what are the key forms of the elements in environmental systems? For example for C, it’s CO2, organic C, carbonate minerals, CH4… Hydrologic Cycle: Evaporation : The conversion of water from a liquid to a gaseous state. Caused by energy input to the earths surface (generally solar input).
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