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Plate Tectonics

By: Robbie Himebaugh. Plate Tectonics. History Of Pangaea part 1. Q:Who originated the theory of Pangaea? A: Alfred Wegener. His theory of continental drift suggested that that continents were all at one time 1 super continent.

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Plate Tectonics

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  1. By: Robbie Himebaugh Plate Tectonics

  2. History Of Pangaea part 1 • Q:Who originated the theory of Pangaea? • A: Alfred Wegener. His theory of continental drift suggested that that continents were all at one time 1 super continent. • Q: Was the theory of a ‘super continent’ originally accepted by scientists? • A: No, not all the scientists did, only half. • Q:What does Pangaea mean? What time period did it occur? • A: Pangaea means ‘all lands’. It occurred 300 million years ago during the Carboniferous period.

  3. History of Pangaea part 2 • Q: What other theories were around when Wegener introduced his? • A: The other theory was that the earth was left in it’s current state after many cycles of the earth cooling and heating. The scientists who believed that were called mobiltists. • Q: Alfred Wegener was accomplished in astronomy, meteorology, and climatology. How do you think these sciences helped him with his theory of Pangaea? • A: By studying other planets and how the formed, that could help him how the earth was formed. Climatology and meteorology would help him see how the earths climate and weather has changed and stayed the same over time all across the earth. • Q: Who's ideas later helped Wegener's theory. How did this relate to his original findings • A: Arthur Holmes later came up with the lithosphere which is a hot liquid like layer under the earth that is always moving , helping Wegener's theory of continental drift. Vocab: plate-large landmass

  4. Convergent Boundaries • Convergent boundary: 2 plates moving in opposite directions meet and one is dragged down beneath the other (sub ducted) • When this happens, a trench is formed • Ex: Aleutian trench- Pacific plate is sub ducting under the North American plate • Vocab: • Trench- deep crack in earth

  5. Divergent Boundaries • Divergent boundary: 2 adjacent plates pull apart • Volcanic islands, valleys, and mountains can form when this occurs • Ex: Mid Atlantic ridge- separates the North and South American plates from Eurasian and African plates • Vocab: Volcano-large tube of magma at ground level • Mountain- a huge hill that gradually gets stepper

  6. Transform Boundaries • 2 plates slide horizontally past each other • An earth quake, mudslides, landslides • Ex: San Andreas fault. Still sliding today and causing earth quakes • Vocab: Earth Quake- mild to violent shaking of the ground • Mudslide- tons of mud falling down • Landslide- land/earth that is falling

  7. Real World Connections • We live on the north American plate • Our boundary plates include Eurasia, African, Cocas, Caribbean, and Pacific • Cincinnati is not in any danger. Hawaii is in danger of volcanoes. The area around the San Andreas fault and Yellow stone are because the San Andreas fault is still causing earth quakes and Yellow stone is a giant volcano that will explode. (yellow stone isn’t expected to go off soon)

  8. Work Cited • vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html • www.ucmp.berkeley.edu/geology/techist.html • scign.jpl.nasa.gov/learn/plate2.htm • www.dictionary.com

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