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Plate Tectonics

Plate Tectonics. What is it and what evidence supports it?. Evidence 1 – Continents fit together like a puzzle. Look at the globe for today’s world… do you believe it could have been like this?. http://3dparks.wr.usgs.gov/nyc/images/fig83.jpg. Scientist Rejected Wegener's Ideas.

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Plate Tectonics

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  1. Plate Tectonics What is it and what evidence supports it?

  2. Evidence 1 – Continents fit together like a puzzle Look at the globe for today’s world… do you believe it could have been like this? http://3dparks.wr.usgs.gov/nyc/images/fig83.jpg

  3. Scientist Rejected Wegener's Ideas Alfred Wegener gets most credit for the idea that the continents have moved to their current locations… Why weren’t Wegener’s ideas accepted? • They wanted more… EVIDENCE to explain. Wegener’s biggest problem was explaining how the continents could have moved!

  4. Mapping the Ocean Floor Evidence 2 How can you map something so far away? ? ? ? ? ? You can’t just dive down there…

  5. Sonar!!! Using sound waves to find the distance to objects

  6. Evidence 2 – Finding of ridges or “seams” in the ocean floor Mid-Ocean Ridges http://pubs.usgs.gov/publications/text/baseball.html

  7. Matching Fossils... Where? Evidence 3 http://pubs.usgs.gov/publications/text/baseball.html

  8. Seismic Data: Earthquakes & Volcanoes Evidence 4

  9. Evidence 5 Age of Ocean Floor

  10. Plate Tectonics http://www.aic.cuhk.edu.hk/web8/world%20map.jpg

  11. Where Can You See the effects of Plate Tectonics? Himalayas

  12. Where Can You See the effects of Plate Tectonics? Mt. St. Helens

  13. Volcano Locations Long before

  14. Where Can You See the effects of Plate Tectonics? San Andreas Fault

  15. So that’s cool and all… but how could the continents have moved???

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