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10.10.2012 Wednesday Continental Drift vs. Plate Tectonics (Similarities and differences) Continental Drift - Describes continents - Continents rearrange ( join together and drift apart) - Original idea - Proposed by Alfred Wegner in 1915 Both Plate Tectonics Continental Drift vs. Plate Tectonics (Similarities and differences) Continental Drift Both Plate Tectonics - Describes continents - - Continents rearrange ( join together and drift apart) Describes the earth’s plates (including crust under oceans) - Lithosphere is destroyed and formed at plate boundaries - Modern theory supported by additional evidence such as satellite measurements of continental movement. - Helps explain earthquak es, volcanoes, mountain formation - Original idea - Proposed by Alfred Wegner in 1915 Continental Drift vs. Plate Tectonics (Similarities and differences) Continental Drift Both - Describes continents - Continents rearrange ( join together and drift apart) - Original idea - Proposed by Alfred Wegner in 1915 - Occur over geological time Land was once all connected in supercontinent known as Pangea Plate Tectonics - Describes the earth’s plates (including crust under oceans) - Lithosphere is destroyed and formed at plate boundaries - Modern theory supported by additional evidence such as satellite measurements of continental movement. - Land masses have moved over the earth’s face - Relies on evidence from fossils and rock layers - Helps explain earthquake s, volcanoes, mountain f ormation Test on Thursday (10.18.2012) • Ms. Kim is not available on Wednesday 10.17.2012 (Wednesday, the day before the test). • If you have questions, ask me before Wednesday. • Study ahead of time. • We will review on Monday (Content covered – everything since day 1) Understanding Plate Boundaries Type of Plate Motion Sliding Spreading Colliding Scientific Term for Boundary Type At this type of plate boundary, which of the Following geological processes are likely to occur? Earthquakes Volcanoes Etc. At this type of plate boundary, what happens to the lithosphere? It is: Formed Destroyed neither Example of this type of plate boundary Understanding Plate Boundaries Type of Plate Motion Scientific Term for Boundary Type At this type of plate boundary, which of the Following geological processes are likely to occur? Earthquakes Volcanoes Etc. At this type of plate boundary, what happens to the lithosphere? It is: Formed Destroyed neither Example of this type of plate boundary Sliding Transform Neither San Andres Fault in California Spreading Divergent Rift valley Formed East African Rift Colliding Convergent Two oceanic: Island arc, trench Oceanic and continental: volcanic mountain range, trench Two continental: folded mountain range Destroyed Two oceanic: Japan Oceanic and continental: Cascades and Andes mountain Two continental: Himalayas, Alps, Appalanchians Fault line