NAME Lab TA Introduction to Oceanography, EPSS15 Practice Lecture Eam #1, Fall 2017 Eam# 654321 Instructions 1. PRINT your name and lab TA s name on BOTH the cover sheet of this eam and on the SCANTRON form. Put your student ID # on the SCANTRON, and put the eam number from the top right corner of this page in the Special Code blanks as well. 2. You will have at least until 1:45pm to answer the questions. For multiple choice questions, mark the correct answer on the SCANTRON. Choose the best answer for each question. For free-response questions, answer in the space provided in the eam booklet. 3. You must turn in the eam, the SCANTRON form and show proper ID at the end of the eam period. 4. Answer keys will be posted outside the Oceanography Lab early net week. 5. Curved scores will be posted on the Online Gradebook. 6. Your SCANTRONS and eam will be available to be picked up in the Oceanography Lab. 1
Oceanography EPSS15, Practice Lecture Eam #1, 10/27/17 (the actual eam will have ~40 questions) 1. This prolific eplorer undertook three voyages of discovery between 1768 and 1779, in the ships Endeavor, Resolution, and Adventure. These epeditions mapped the Hawaiian, South Georgia, and South Sandwich Islands, and searched for Antarctica: a) Claudius Ptolemy. b) Thor Heyerdahl. c) John Cabot. d) James Cook. e) Prince Henry the Navigator. 2. Typical of the oceanic crust: a) Granitic rock b) Basaltic rock c) Iron metal 3. These are typical along the continental margins of the Atlantic Ocean: a) deep-sea trenches. b) divergent plate boundaries. c) convergent plate boundaries. d) transform plate boundaries e) broad continental shelves. 4. The San Andreas Fault a) is an ancient mid-ocean ridge that formed offshore of the ancient California coast. b) is an area where old oceanic crust is recycled. c) is a fracture zone near the edge the Pacific plate. d) is a transform boundary between the Pacific and North America plates. e) is the remnant of a continent-continent collision that occurred when Pangaea still eisted. 5. The Antarctic-Australian Discordance is a remarkable area of the seafloor between Australia and Antarctica. The area is underlain by oceanic crust, but the crust is very thin. Based on what you know about isostasy, which of the following is most likely to be true? a) This area of the ocean is unusually deep. b) This area of the ocean is unusually shallow. c) This oceanic crust is very old. d) The nearest mid-ocean ridge is spreading very fast. e) This is a convergent plate boundary. 6. Which of these statements is true of the plates in plate tectonics? a) Plates consist mainly of the Earth s asthenosphere, with a thin layer of crust attached. b) Earthquakes mainly occur near the edges of plates. c) A plate is an area of the lithosphere that is plastic and deformable. d) Most volcanoes occur near the middle of a plate. e) California is contained within one plate 2
7. Which of these is the most abundant type of marine sediment by mass? a) Hydrogenous (or authigenic) sediments. b) Abyssal clay c) Cosmogenous sediments. d) Terrigenous (or lithogenous) sediments. e) Biogenous sediments. 8. Manganese nodules are most common a) on continental slopes. b) in areas of rapid sediment accumulation. c) on the deep-ocean bottom far from land. d) near the mouth of major rivers. e) None of the above 9. Which of the following is correctly arranged in order of increasing density? a) Liquid water, oceanic crust, core, mantle. b) Core, mantle, continental crust, liquid water. c) Mantle, oceanic crust, liquid water, core. d) Liquid water, continental crust, mantle, core. e) Liquid water, core, mantle, continental crust. ------------------------------------------------------------------------------------------------------------ Refer to the cross-section below for the following question: 10. Which point is over a place where deep earthquakes (more than 100km below the surface) are likely to occur? a) near the point marked A b) near the point marked B c) near the point marked C d) near the point marked D e) near the point marked E f) A B C D E 3
The bathymetry map below shows part of the Atlantic Ocean, over an area roughly 4,000 kilometers across. Light gray indicates shallow water, darker gray is deep water. The little black spot at left is an island, and a few other water depths are labeled. The greatest depth (darkest) on this map is approimately 6 km, at lower left. The questions below refer to this map. 11. Sketch in a line following a plate boundary and label it Boundary. 12. Write abyssal in an area that is part of an abyssal plain. 4983m 5432m North 2003m 51m 2998m 6117m 5890m NOTE Feel free to draw arrows if the area you want to label is too dark for your pencil lines to be visible. Just make sure it s clear what area you are pointing to! 13. Use the histogram at right to estimate the most typical surface elevation in areas underlain by continental crust. Make sure to indicate whether the elevation is above or below sea level. 4
All Done! Multiple choice answers: 1 d; 2 b; 3 e; 4 d; 5 a; 6 b; 7 d; 8 c; 9 d; 10 a 5