plate+tectonics+review

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For questions 21 and 22, post some pictures of each! You can draw them or find them. Use the "insert images" button above (below and left of the E in the word Editor) to paste them in.

21. Be able to recognize each of these types of faults and folds and the force associated with it: normal, reverse, thrust, strike-slip, monocline, syncline, anticline. 22. Draw a horst-and-graben fault, labeling the foot and hanging walls, the type of fault, and the force associated with it. 23. Explain the formation of the Basin-and-Range province. __Plate Tectonics__ On this particular test, geography is important! Know the names of landforms and countries associated with plate tectonics. 24. Who was Wegener? What idea did he popularize?He is most notable for his theory of continental drift wich hypothisized that the continents were slowly drifting around the earth -Julian- 25. Describe the theory of continental drift and why it was different from plate tectonics. **Continental drift is the movement of the earth's continents relative to eachother.~ Andrew** 26. List and explain at least 6 types of supporting evidence for the theory of plate tectonics. 1. **The shapes of many continents are such that they look like they are separated pieces of a jig-saw puzzle. 2. Many fossil comparisons along the edges of continents that look like they fit together suggest species similarities that would only make sense if the two continents were joined at some point in the past. 3. There is a large amount of seismic, volcanic, and geothermal activity along the conjectured plate boundaries. 4. There are ridges, such as the Mid-Atlantic Ridge where plates are separating that are produced by lava welling up from between the plates as they pull apart. 5. There are mountain ranges being formed where plates are pushing against each other. 6.Coral reefs in Antarctica -Julian- ** 27. Describe each type of plate boundary: convergent, divergent and transform. 28. What 3 types of convergent boundaries exist and what landforms are associated with each? Convergent Boundaries= ocean-continent, ocean-ocean, continent-continent. Land forms= island arcs, trenches, volcanic mountains, folded mountains, &subduction zone._christina ** 29. What is a subduction zone? If two plates meet, what determines which plate subducts? **Subduction zone is when one plate is under another. The more oceanic plate goes underneath the plate with more land. _christina ** 30. What is an island arc system? Name a few geographic examples. 31. What 2 types of divergent boundaries exist and what landforms are associated with them? **constructive boundary ** or an **extensional boundary....ocean basins and rift valleys are associated with them. -Julian- ** **Divergent boundaries: ocean -ocean, continent-continent. Landforms= mid-ocean ridge, fissure volcanos, and rift valley._christina** 32. What is the relationship between the age of ocean floor and its distance from the mid-ocean ridge?the farther away the older....as the mid-ocean ridge spreads lava comes out and creates new ocean floor. -Julian- The closer to the MAR the newer the floor. 33. What is thought to be the mechanism that “drives” plate motion?plate movement is driven by convection within the upper mantle -Julian- 34. What is paleomagnetism and how does it help to date rocks and show plate motions? **a pattern of magnetic rocks near the MAR which point to the north pole in every other time period. -Josh **
 * Convergent= two plates pushing together. Divergent= two plates pulling apart. Transform=two plates (side by side) rubbing against each other. _christina **
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 * Island Arc System= chain of small volcanic islands. Geographic examples= Aleution, Mariana, and Tongol islands._Christina **

35. Explain “polar wandering”.<span style="font-size: 12px; color: rgb(0,0,255); font-family: 'Arial Black',Gadget,sans-serif;">the migration over the surface of the Earth of the magnetic poles of the Earth through geological time. -Julian - 36. What are terranes? Give a geographic example of a piece of continent built of terranes <span style="color: rgb(250,20,243);">Terranes are strips of land that have been attatched to a continent because of subduction. An example would be parts that are attached on to Alaska. Another example is the Baha Peninsula in California. -Elizabeth