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Name: Unit 7 – Forces that Change the Earth Study Guide 1. What is Pangaea? All the continents 2. Which scientist first proposed the Continental Drift Theory? Alfred Wegener 3. Which two continents did Alfred Wegener think looked like they fit together like puzzle pieces? South America & Africa 4. True or False – Alfred Wegner’s “Continental Drift” hypothesis was not accepted until four decades after his death because he could not explain how continental plates moved. 5. True or False – The theory of plate tectonics is a result of knowing that Pangaea was a super-continent. 6. True or False – The theory of plate tectonics is a result of why the oceans and continents have always been in the same locations. 7. True or False – The theory of plate tectonics is a result of finding older rocks near continents and younger rocks near the center of oceans. 8. True or False – The theory of plate tectonics is a result of similar fossils being found on all continents. 9. Why did Alfred Wegener think that fossils from a particular type of reptile were found on both sides of the Atlantic Ocean? The Atlantic Ocean did not exist in earlier times. 10. What force is responsible for plate movement? Unbalanced 11. True or False – A deep ocean trench is a landform that will most likely be formed when two continental plates collide at a plate boundary. 12. True or False – A mountain range is a landform that will most likely be formed when two continental plates collide at a plate boundary. 13. True or False – A rift valley is a landform that will most likely be formed when two continental plates collide at a plate boundary. 14. True or False – A volcanic island is a landform that will most likely be formed when two continental plates collide at a plate boundary. 15. A diagram showing which of the following would best represent the type of plate movement that results in mountain building? a. Arrows going the same direction b. Arrows moving away from each other c. Arrows moving past each other in opposite directions d. Arrows moving toward each other 16. True or False – The formation of mountains is not explained by the theory of plate tectonics. 17. Would a rift valley or a subduction zone most likely form when a continental and an oceanic plate collide? 18. Would a volcanic island or a mid-ocean ridge most likely be found at a divergent boundary? 19. When two plates collide, the process of one plate sinking below another is called Subduction 20. True or False – Mid-Ocean ridge is the landform most likely to be found at a convergent boundary. 21. True or False – Fault line is the landform most likely to be found at a convergent boundary. 22. True or False – Mountain is the landform most likely to be found at a convergent boundary. 23. True or False – Rift Valley is the landform most likely to be found at a convergent boundary. 24. A transform fault or a trench is the geographical feature that could form when two plates collide. 25. Which type of plate boundary is most likely to have cause The Ring of Fire? Convergent Boundary 26. True or False – Scientists believe that convection currents within the asthenosphere are responsible for the movement of the plates that form the Earth’s crust. 27. True or False – Scientists believe that convection currents within the Lithosphere are responsible for the movement of the plates that form the Earth’s crust. 28. True or False – The most recently formed crust of the Earth would be found where two plates are pushing directly toward each other. 29. True or False – The most recently formed crust of the Earth would be found where two plates are moving away from each other in opposite directions. 30. True or False – The most recently formed crust of the Earth would be found where one plate is going under another plate. 31. True or False – The most recently formed crust of the Earth would be found where plates moving sideways passed each other. 32. Would weathering most likely reshape the top of a land form to increase elevation or decrease elevation? 33. A mountain will most likely become rounder and less steep or more steep and jagged over time? 34. Using a topographic map, how do you figure the change in elevation? Ending location – beginning location 35. Using a topographic map, how do you know which area is the most steep? The contour lines are closer together 36. On a topographic map the V points toward the higher elevation. So if a stream is flowing down a mountain (as shown on a topographic map) left to right, which direction would the V be? <<<< or >>>>>> 37. Based on the previous question, where would a delta form? To the right 38. Where would the youngest ocean floor be found on a model? Oceanic spreading 39. Where would the oldest ocean floor be found on a model? Subduction Zone 40. Where would a convergent plate boundary be found on a model? Where two plates are colliding 41. Where would a divergent plate boundary be found on a model? Where two plates are moving apart