1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Continental Drift Theory Plate Tectonics How the crust is Deformed Results of Stress Misc.

2. What was the name of the hypothesis proposed by Alfred Wegener?

3. Continental Drift

4. What is the theory of continental drift?

5. The continents once formed a single landmass, broke apart, and drifted into their current positions.

6. According to the theory of continental drift, South America was once joined to which continent?

7. Africa

8. Two types of crust that make up the earth’s surface?

9. oceanic and continental crust

10. Diagram ALL the components of a reverse fault.

11. correct team, place diagram on board

12. Explain the theory of Plate tectonics

13. The theory that the lithosphere is made up of plates that float on the asthenosphere and that the plate are moved by convection within the mantle.

14. What is a plate boundary called where one plate slides under another?

15. Convergent Plate Boundary – Subduction Zone

16. The zone of mantle beneath the lithosphere that consists of slowly flowing rock.

17. asthensophere

18. Where do convection currents occur?

19. asthenosphere (part of the mantle)

20. Explain a divergent plate boundary.

21. Two tectonic plates are moving away from each other.

22. Isostatic adjustment can occur as a result of?

23. The crust adjusting to changes in density or mass. (From ice sheets melting or where bodies of water deposit large amounts of sediment.)

24. What is a major cause for crustal deformation?

25. Movement of earth’s lithospheric plates

26. Explain the term stress and name the three main types of stress in rocks.

27. Stress is a force that applies pressure to the rocks in the earth’s crust. The 3 types are compression, tension and shearing.

28. What is a change in the shape or volume of crustal rock due to stress called?

29. strain

30. What is the balance of the up and down forces between the crust and the mantle called?

31. isostasy

32. What is the permanent deformation of a rock without the rock bending called?

33. folding

34. A fault is a break in rock along which rocks on either side of the break move. There are 4 types of faults. Name and explain each one!

35. 1. Normal Fault- The hanging wall slides down the fault plane 2. Reverse fault- compression causes the hanging wall to move up the fault relative to the foot wall. 3. Thrust fault- special type of reverse fault, fault plane is at a low angle or nearly horizontal. 4. Strike slip fault- rock on either side of fault plane slides horizontally.

36. Draw a diagram illustrating a hanging wall.

37. If the diagram is correct, place on board and explain to the class.

38. Draw a diagram of a fault plane.

39. If correct, place on the board and explain.

40. Explain an anticline.

41. A general type of fold, which are upcurved folds in the layers of rock.

42. Explain seafloor spreading and where it occurs.

43. Seafloor spreading is where new ocean floors is being created along a mid-ocean ridge, and it occurs at divergent boundaries.

44. What forms at subducted plate boundaries?

45. Trenches and volcanoes

46. As rock moves away from a mid- ocean ridge it is replaced by?

47. Molten rock (lava)

48. The type of collision that occurs when two lithospheric plates converge is determined primarily by plate ___________.

49. density

50. Describe what happens when oceanic crust collides with continental crust. If necessary draw a diagram.

51. Oceanic crust subducts below the continental crust, forming a trench. The oceanic crust then melts and will cause volcanoes to form.