Earth Science Chapter 14 Section 2 Review

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1 Name: Class: Date: Earth Science Chapter 14 Section Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Which of the following is NOT one of the three major regions of the ocean floor? a. continental margins c. coastal plain b. ocean basin floor d. mid-ocean ridges. Which of the following currents is associated with downslope movements of dense sediment-rich water? a. avalanche current c. turbidity current b. density current d. longshore current 3. Seamounts are. a. volcanoes that form on the ocean floor b. only found in the Pacific Ocean c. a special type of oceanic trench d. submarine canyons found near Australia 4. Which of the following is associated with mid-ocean ridges? a. rift valleys c. extreme temperatures b. mountainous topography d. volcanic structures 5. The gently sloping submerged surface extending from the shoreline toward the deep ocean is called. a. continental shelf c. continental rise b. continental slope d. submarine canyon 6. Important mineral deposits, including large reservoirs of oil and natural gas, are associated with. a. rift zones c. mid-ocean ridges b. ocean trenches d. continental shelves 7. Which of the following is NOT a zone included in the continental margin? a. continental slope c. continental coast b. continental rise d. continental shelf 8. Which of the following occurs at the continental margin in the Pacific Ocean? a. volcanic activity c. plate interactions b. earthquakes d. all of the above 9. Which regions are thought to be the most level places on Earth? a. mid-ocean ridges c. deep-ocean trenches b. abyssal plains d. continental slopes 10. Which part of the ocean is deepest? a. ridges c. trenches b. rifts d. seamounts 11. Mineral-rich water, heated by newly formed oceanic crust, escapes through cracks in the ocean floor called. a. nodules c. hydrothermal vents b. rifts d. trenches

2 Name: 1. Where does seafloor spreading occur? a. at convergent plates c. near the ocean surface b. on seamounts d. at divergent plates Completion Complete each statement. 13. In Figure 14-, Point C represents an ocean floor region known as a(n). 14. In Figure 14-, Points A and E represent an ocean floor region known as a(n). 15. The narrow continental margin of the Ocean experiences volcanic activity and earthquakes. 16. New is formed at mid-ocean ridges as magma rises between diverging plates and cools. Short Answer: Complete TWO questions for FIVE points each. Each additional correct answer is worth one point extra credit. 17. What is the continental margin?

3 Name: 18. Describe the continental margin in the Atlantic Ocean. 19. Where do trenches form? Essay: Complete ONE question for FIVE point. Each additional correct answer is worth one point extra credit. 0. Identify and describe the features found on the ocean basin floor. 3

4 Earth Science Chapter 14 Section Review Answer Section MULTIPLE CHOICE 1. ANS: C PTS: 1 DIF: L1 OBJ: ANS: C PTS: 1 DIF: L1 OBJ: ANS: A 4. ANS: B 5. ANS: A PTS: 1 DIF: L1 OBJ: ANS: D PTS: 1 DIF: L1 OBJ: ANS: C PTS: 1 DIF: L1 OBJ: ANS: D PTS: 1 DIF: L OBJ: ANS: B PTS: 1 DIF: L1 OBJ: ANS: C PTS: 1 DIF: L1 OBJ: ANS: C PTS: 1 DIF: L1 OBJ: ANS: D PTS: 1 DIF: L OBJ: 14.7 COMPLETION 13. ANS: mid-ocean ridge 14. ANS: continental margin 15. ANS: Pacific PTS: 1 DIF: L1 OBJ: ANS: ocean floor PTS: 1 DIF: L OBJ: 14.7 SHORT ANSWER 17. ANS: the zone of transition between a continent and the adjacent ocean basin floor PTS: 1 DIF: L1 OBJ: ANS: The continental margin in the Atlantic Ocean is covered by thick layers of sediment, and the region has little volcanic or earthquake activity. PTS: 1 DIF: L OBJ:

5 19. ANS: Trenches form at sites of plate convergence where one moving plate descends beneath another and plunges back into the mantle. PTS: 1 DIF: L1 OBJ: 14.7 ESSAY 0. ANS: Features found on the ocean basin floor include deep-ocean trenches, abyssal plains, and volcanic peaks. Deep-ocean trenches are long, narrow creases in the ocean floor that form the deepest part of the ocean. Abyssal plains are deep, extremely flat regions covered by thick accumulations of fine sediment. Seamounts are submerged volcanic peaks. Guyots are former volcanic peaks that, due to erosion, become flat-topped structures.

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