7. Are the plates covering the whole Earth. they are moving and spreading
8. Colliding Plates and sliding plates
9. Continental Crust
10. Spreading Plates
11. plate movement
12. Pangea
13. Mountains
14. are created by
15. evidence for age of earth
16. Fossils
17. are
18. Harry Hess
19. Considered one of the founding fathers of the theory of plate tectonics
20. Age of earth
21. Geological time scale shows us how old the earth is
22. Forces of nature
23. Seismic Waves
24. Sonar
25. Theory
26. Evidence
27. IS everything we have done. Everything on her is evidence of how old the earth is. This can all help us
28. Theory
29. Physical Chemical
30. Harry hess came along and discovered that the bottom of the sea-floor had ridges in the center and trenches near continents using sonar. Evidence: Magentic Strips, age of rocks are younger in the center and increase in age as you get closer to trenches, molten material erupting from the center of the mid-ocean ridge.
31. The study of plate movement on earth driven by convection currents in teh mantle Three types of movement Spreading(causes ridgesto form and volcanic eruptions Colliding(Volcanoes and mountains to form Sliding(causes faults and folds
32. Eight forces of nature that shape our land over varying times(slow and fast) and spatial scales(small changes to huge changes Plate movement, Folds and Faults, Earthquakes, Volcanic eruptions, Weathering, Glacier erosion, wind erosion, and water erosion
33. Wind Erosion
34. Glacier Erosion
35. Water Erosion
36. Volcanic eruptions
37. Weathering
38. Layers
39. Crust
40. Mantle
41. Lithosphere
42. Asthensophere
43. Outer Core
44. Inner Core
45. Internal
46. Creates and destroys the sea floor.
47. Creates hurricanes, sand dunes and tornadoes. They also move around dirt.
48. Oceanic Crust
49. Sea Floor Spreading
50. Deep ocean trench
51. Mid Ocean Ridge
52. Continental Drift
53. Mid-ocean ridge
54. Are created by
55. Convection Currents
56. Considered one that theorize the movement of continental plates
57. Inside earth
58. hurricanes
59. Subduction
60. https://www.youtube.com/watch?v=KmJXSP-Bdhk
61. Valleys
62. Creates
63. Smooths things out
64. Alfred Wegenger
65. Oceanic Crust
66. Continental Crust
67. The Convection currents in the Mantle move the Earth's lithosphere(which contains our plates)
68. Alfred Wegener discovered rock patterens, fossils, and glacier evidence, and the Jigsaw fit of continents to support the idea that our continents were once together. Scientific communtiy did not believe him and thought he was crazy because he could not explain HOW they move.
69. Geological time scale Evidence Rock and fossil data. A time scale is spread out where it has only been in the past 500 million years that all life we know has evidence.
