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Name:_____________________ Period: ________ Oceanography Worksheet #1 The diagram below represents a landscape in which sediments were deposited by a continental glacier. Letters A, B, C, D, and E represent locations in this area. 1. Classification of the ocean bottom into the areas shown is based on the 1 distance from continental landmasses 2 topography of the ocean floor 3 age of ocean-bottom rocks 4 type of ocean-bottom sediments 2. At which location would land-derived sediments most likely be accumulating on the ocean bottom? 1 A 3 C 2 B 4 D 3. Which statement about the age of the ocean-floor rocks is correct? 1 All ocean-floor rocks are generally the same age. 2 Rocks at location C are generally older than rocks at locations A and B. 3 Rocks at location C are generally younger than rocks at locations A and B. 4 Igneous rocks at location D are generally younger than rocks at location C. Base your answers to questions 4- 7 on the diagram below. The diagram shows ocean waves approaching a shoreline. A groin (a short wall of rocks perpendicular to the shoreline) and a breakwater (an offshore structure) have been constructed along the beach. Letters A, B, C, D, and E represent locations in the area. 4. What is the most common cause of the approaching waves?? 1 underwater earthquakes 2 variations in ocean-water density 3 the gravitational effect of the Moon 4 winds at the ocean surface 6. At which location will the beach first begin to widen due to sand deposition? 1 A 3 C 2 B 4 E 5. This shoreline is located along the east coast of North America. Which ocean current would most likely modify the climate of this shoreline? 1 Gulf Stream 3 Brazil Current 2 Canaries Current 4 California Current 7. The size of the bulge in the beach at position 8. The curved pattern of surface currents in the North Atlantic is most affected by 1 the Earth’s rotation 2 convection in the Earth’s mantle 3 density differences of ocean water 4 gravitational attraction of the Moon 10. When the seafloor moves as a result of an underwater earthquake and a large tsunami develops, what will most likely occur? 1 Deep-ocean sediments will be transported over great distances. 2 No destruction will occur near the origin of the earthquake. 3 The direction of the tsunami will be determined by the magnitude of the earthquake. 4 Severe destruction will occur in coastal areas. 9. What is the source of most dissolved minerals in seawater? 1 weathering of seafloor rocks 2 weathering and erosion of continental rocks 3 deep-ocean organic-matter sediments 4 gases from underwater volcanic eruptions Note question 7 has only three choices. D will 1 2 3 decrease increase remain the same