Compare geochemical cycles for phosphorus and nitrogen

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Reference no: EM133934796

Questions:

1. Contrast the geochemical cycles for phosphorus and nitrogen and explain why the differences are important?

2. What are phosphorus and nitrogen primarily used for? Explain why these elements are so important?

3. What is meant by the permeability of a soil, and why might a sandy soil and a soil that has well-developed granular structure both have high permeability?

4. Field capacity of a soil is defined as the amount of water it can hold against the force of gravity. Similar to a soaked sponge that will retain some water if it is held up and the water allowed to drain, soils that are allowed to drain after being thoroughly wetted (e.g. after a heavy rainfall) will retain some of the added moisture. Which soil would you expect to have a greater field capacity, one with a silty clay loam texture, or one that is loamy sand? Explain your answer.

5. What is the geothermal gradient or geothermal heat flux? Why does it get hotter towards the center of the Earth?

6. Contrast the lithosphere and asthenosphere. How are the criteria used to define these layers different from the criteria used to recognize the crust, mantle and core?

7. How have scientists used the occurrence of fossils to reassemble continental masses cartographically?

8. How does the age of oceanic rock serve as evidence for seafloor spreading?

9. Name examples of a divergent, a convergent, and a transform plate boundary. How are these boundaries different?

10. What is mass wasting? What are some of the important variables used to identify and distinguish types of mass wasting?

Reference no: EM133934796

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