Web-assign_4 - PLANET EARTH Department of Earth&...

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Unformatted text preview: PLANET EARTH: Department of Earth & Planetary Sciences, spring ‘12 Rutgers University Geological sciences (100) Dr. Christopher J. Lepre [email protected] Web assignment, assignment #4: Plate Tectonics All answers must be placed on the scan­tron sheet. Answers place on this paper or answers submitted via email will not be accepted. Use these links found on this webpage: http://www.ucmp.berkeley.edu/geology/tectonics.html 28. Alfred Wegener proposed that: a. sea floor spreading was a force behind plate tectonics b. thermal convection of the mantle was a force behind plate tectonics c. all continents once joined together to form a single mass of land 29. Fossils, marks left by the scraping of glaciers, and the formation of mountains were different lines of evidence used by Wegener to disprove continental drift. a. True b. False 30. Arthur Holmes proposed that: a. sea floor spreading was a force behind plate tectonics b. thermal convection of the mantle was a force behind plate tectonics c. all continents once joined together to form a single mass of land 31. Hess and Deitz proposed that: a. sea floor spreading was a force behind plate tectonics b. thermal convection of the mantle was a force behind plate tectonics c. all continents once joined together to form a single mass of land 32. The Earth's surface is covered by a series of crustal plates. a. True b. False 33. The greatest heat flow from ocean floor is: a. centered at the crests of mid‐oceanic ridges b. farthest from mid‐oceanic ridges c. next to the coastlines of continents 34. Rocks found in different parts of the planet with similar ages have the same magnetic characteristics. a. True b. False 35. Deep Sea Trenches are often associated with and parallel to large: a. mid‐ocean ridges b. continental mountain ranges c. parts of young sea floor 36. Island arcs are usually situated along the ocean side of deep‐sea trenches. a. True b. False ...
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