CRISES OF A PLANET-testbank MT#2

CRISES OF A PLANET-testbank MT#2 - CRISES OF A PLANET GEOL...

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CRISES OF A PLANET - GEOL 108 MIDTERM 2 TEST BANK TRUE/FALSE (2 points each) 1. T Valley widening primarily occurs by mass wasting subsequent to erosion by running water. 2. T Floodplains are flat surfaces adjacent to rivers formed by deposition during floods. 3. T A river's width, depth, and velocity all increase downstream. 4. F The shallow part of a stream occurs on the outside of a turn. 5. T Erosion by a stream occurs on the mostly on the outside of a turn. 6. T Erosion and deposition are equally balanced along lower (downstream) portions of a stream's longitudinal profile. 7. T The role of erosion is greater than that deposition at high elevations of a stream's longitudinal profile. 8. T Up to 75% of water supplied to southern California communities is imported. 9. T Deposition by a stream occurs on the mostly on the inside of a turn. 10. F The average annual probability of a 50-year flood at a given location is 50% 11. T Ozone is a principle component of photochemical smog. 12. T Our present day atmosphere is principally composed of nitrogen and oxygen with minor amounts of H 2 O, CO 2 , and other compounds. 13. F Natural rain water has a pH = 7. 14. F Acid rain has a pH near 14. 15. T Ground-level ozone forms from sunlight interacting with nitrous oxide. 16. T Nitrous oxide is a principle component of photochemical smog. 17. F Acid rain has a pH near 7 (neutral). 18. T Atmospheric CO 2 increases during the Fall and Winter and decreases during the Spring and Summer. 19. T Acid rain is an example of regional smog. 20. T Warming oceans will expel dissolved gasses. 21. T The average annual level of atmospheric CO 2 is increasing today. 22. T The average annual level of atmospheric carbon dioxide, methane, CFC's, and NO 2 have all dramatically increased during the past century. 23. T Ground level ozone forms from sunlight interacting with nitrous oxide. 24. *F Carbon monoxide is a principle component of photochemical smog. 25. *F A significant source of atmospheric sulfur comes from burning of sulfur-rich natural gas. 26. T Atmospheric CO 2 increases during the Fall and Winter and decreases during the Spring and Summer. 27. F A bajada is a dry lake bed in the desert. 28. T Transverse dunes occur in areas where the sand supply is large. 29. F Tropical deserts form on the downwind side of mountain ranges. 30. F The flat erosion surface formed at the edges of retreating desert mountains is termed desert pavement. 31. T The flat erosion surface formed at the edges of retreating desert mountains is termed pediment. 32. F The steep side of a sand dune or ripple mark is on the upwind side. 33. T Wind shadow deserts form on the downwind side of mountain ranges. 34. F Sub-tropical deserts occur along equatorial latitudes. 35. T Desert regions of Earth are increasing in size today.
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