6246FES10_KEY

6246FES10_KEY - GLY 6246 Name KEY 81 points - 6 TOOK EXAM...

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1 GLY 6246 Name KEY 81 points - 6 TOOK EXAM April 29, 2010 Number in red to the left of the question is the number of incorrect responses. FLORIDA ATLANTIC UNIVERSITY ADVANCED ENVIRONMENTAL GEOCHEMISTRY Final Examination True-False - Print the letter T or F in the blank to indicate if each of the following statements is true or false. Illegible answers are wrong. (1 point each) 0 T 1. Buffer solutions are at equilibrium. 1 T 2. The following reaction is temperature dependent. 1 F 3. There is more carbon dioxide in the atmosphere than is dissolved in the ocean. 0 T 4. The effects of acid rain are worst in headwater streams and high-altitude lakes. 2 F 5. The discussion of carbonate equilibrium is made easier by the lack of kinetic problems. Equilibrium is usually maintained in the oceans, and equilibrium thermodynamic calculations provide excellent agreement with observed values. 2 F 6. Soil water occupies the phreactic zone, where it fills all available pore space, and is not in contact with gas. 0 T 7. The effectiveness of biological activity in regulating the flux of elements in a given area is often seasonal. 2 T 8. Carbonate mineral weathering is usually congruent dissolution by acid. 0 T 9. One result of mineral breakdown is a release of essential nutrients in soluble forms usable by plants. 3 F 10. Expressed on a parts per million basis, the range of dissolved load in rivers varies over a much wider range than that of suspended load. 4 F 11. Suspended load almost always exceeds dissolved load (on a ppm basis) by a wide margin. 1 F 12. Rivers that carry the highest suspended loads are always very large rivers.
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2 0 T 13. Sediment load in a river depends, among other factors, on climate. Rivers draining areas with warm, wet climates will have high suspended loads. 0 T 14. Nitrogen and phosphorous levels are much higher in the European rivers than in North American rivers. 0 F 15. Most particulate nitrogen (PN) comes from particulate inorganic nitrogen (PIN). 0 T 16. Organic matter in rivers is present as both particulate and dissolved forms. 3 F 17. When DOC:TDS levels are near the average value of 1:19, DOC affects mainly major ion chemistry. 0 T 18. Methyl mercury readily passes through the blood-brain barrier. 0 T 19. During the 1990's, mercury emissions in the United States dropped 45%, mostly because of tougher environmental regulations on medical and municipal waste incinerators. 1 F 20. Since most mercury pollution in the United States comes from U.S. and Canadian sources, reducing mercury emissions in the U.S. and Canada makes the 2020 projection for mercury levels in U.S. waters good. 0 F 21. A warm polymictic lake is a tropical lake with rare turnovers. 1 T 22. Lakes with low values of J w will be more responsive to pollution control measures than lakes with high values of J w . 0 F
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This note was uploaded on 12/13/2010 for the course GLY 4200c taught by Professor Warburton during the Spring '10 term at FAU.

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6246FES10_KEY - GLY 6246 Name KEY 81 points - 6 TOOK EXAM...

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