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UA GEOS 212 - practice exam 1

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Exam1_PracticeExam_F14_WExam1_PracticeExam_F14_MC.pdfPoints on this page _________ GEOS212: Introduction to Oceanography NAME ____________________________ EXAM 1: Fall 2014 – Practice Exam Good luck on your exam! The ground rules are simple – you may not use any books, notes, calculators, conversations, or anything but what is in your own head to answer these questions. BEFORE YOU DO ANYTHING ELSE, put your name on all 5 pages of this exam. Read all questions carefully and answer them completely. In my experience the failure to read questions carefully has been the single biggest reason that people lose points on a test. Section 1: Multiple Choice Slides (2 points each, USE CAPTIAL LETTERS!) 1. _________ 11. _________ 21. _________ 2. _________ 12. _________ 22. _________ 3. _________ 13. _________ 23. _________ 4. _________ 14. _________ 24. _________ 5. _________ 15. _________ 25. _________ 6. _________ 16. _________ 7. _________ 17. _________ 8. _________ 18. _________ 9. _________ 19. _________ 10. _________ 20. _________ CONTINUE TO NEXT PAGEPoints on this page _________ Geos 212 - Exam 1 NAME _________________________________ Section 2: Draw and Label Diagrams 1. (10 points) Draw a diagram that shows how oceanic crust is created at a spreading center. Be sure to label the lithosphere, the asthenosphere, the ocean floor, the locations of lava and magma, and the direction of motion of anything moving. 2. (10 points) On the diagram below, showing the profile view from the Andes Mountains, across the Amazon Basin, and extending into the deep ocean, please indicate and label the following: One location where you find living diatoms (L) One location where you find boulders (B) Two locations where you find mud (M) The location where you find the delta (D) One location where you find feldspar (F) Two locations where you find quartz (Q) One location where you find calcite (C) The location where you find the continental shelf (S) CONTINUE TO NEXT PAGEPoints on this page _________ Geos 212 - Exam 1 NAME _________________________________ 3. (10 points) If the island of Kauai is now 800 km from the hot spot that created it, and the rocks there are 10 million years old, how fast is the Pacific plate moving? Give your answer in cm/yr. (Show all work) 4. (10 points) Draw a profile view of a subduction zone where an oceanic plate is subducted beneath a continental plate. On this diagram: 1. Show the direction of motion of each of the two plates (at least 2 arrows) 2. Label the following: seawater, continental crust, ocean crust, mantle, lithosphere, asthenosphere & trench 3. Show magma being made and rising into volcano 4. Indicate the type of rock created at the volcano CONTINUE TO NEXT PAGEPoints on this page _________ Geos 212 - Exam 1 NAME _________________________________ 5. (10 points) On the above map, indicate the following: 1. An ocean-ocean subduction zone (O) 2. A location where you could walk on a spreading center (S) 3. A hot spot volcano (H) 4. A mountain range formed by continental rifting (M) 5. A location where sediment is transported by glaciers (G) 6. A location formerly on the shores of the Tethys Sea (T) 7. A location with very thick sediment (>10km) (X) 8. A place where new ocean crust is being created (C) 9. A location near South America with thick sediment (K) 10. A location near South America with thin sediment (N) CONTINUE TO NEXT PAGE OSSHHMMGGGTXXCCCNKOn2EastWestPoints on this page _________ Geos 212 - Exam 1 NAME _________________________________ BONUS: (6 points) The elements carbon, chlorine and cobalt have different profiles in the ocean. Identify which is accumulated, which is recycled and which is scavenged. Draw the typical profile with depth for each class of element. ACCUMULATED RECYCLED SCAVENGED LO HI LO HI LO HI _________________ _________________ _________________ ELEMENT NAME ELEMENT NAME ELEMENT NAME END OF THE TEST Surface Deep ChlorineCarbonCobalt1 Correct plate motion? A C BA = North American B = Rocky Mountain C = Mexican D = Pacific Which tectonic plate is Tucson on? 23 Rock found in most mountains on continents? A = Basalt B = Calcite C = Limestone D = Granite4 Where is new ocean crust created? A C B5 Hawaii is on a: A = Subduction zone B = Spreading Center C = Hot spot D = Transform fault6 Age of oldest ocean floor? A = 2500 my B = 180 my C = 30 my D = 1 myA = 100 m B = 2 km C = 4 km 7 Water depth on the continental shelf?A = 2 km B = 4 km C = 10 km 8 Water depth here?9 Sea level is NOT affected by: A = amount of sea ice B = amount of ice on land C = water temperature D = shape of ocean basins10 When did Pangaea exist? A = 200 thousand years ago B = 200 million years ago C = 200 billion years agoThese mountains were formed by: 11 A. Continental Rifting B. Continents Colliding C. Subduction Zone D. Hot Spot12 A B C D Ganges river?A = boulders & gravel B = sand & mud C = turbidites D = skeletons 13 Main types of sediment here?14 How is sediment transported? A = rivers B = wind C = glaciers15 Location of turbidites? A B C DA = Quartz B = Mica C = Feldspar D = Clay 16 Iron in your body comes from: Quartz Mica FeldsparA = 0.05% B = 3.5% C = 50% D = 98.6% How much of sea water is salt? 17A = quartz (Si) B = calcite (Ca) C = clay D = salt 18 Diatoms make their skeletons out of:The profile for scavenged elements is: A = uniform from the surface to the bottom B = low at the surface, high at depth C = high at the surface, low at depth D = none of the above 19A = Saltier B = Fresher C = Colder D = Warmer 20 Rain makes seawater:21 Gas consumed by sharks? A = Carbon Dioxide B = Oxygen C = Chlorine D = SulfateOcean warmer at equator than poles due to: 22 A = Direct sunlight at the equator B = Indirect sunlight at the equator C = Volcanoes D = Photosynthesis23 What zone is this? A = Photic zone B = Twilight zone C = Dark zoneA = sediment cycle B = plate tectonics C = sunlight D = none of these 24 This process is driven by:A = Red B = Gray C = Blue Color we would see at 100 meters depth?


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