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What causes continental drift and plate tectonics?

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Presentation on theme: "What causes continental drift and plate tectonics?"— Presentation transcript:

1 What causes continental drift and plate tectonics?
Copyright © 2010 Ryan P. Murphy

2 Convection: Vertical circulation in which warm rises and cool sinks
Convection: Vertical circulation in which warm rises and cool sinks. Flow of heat by this circulation. Copyright © 2010 Ryan P. Murphy

3 Copyright © 2010 Ryan P. Murphy

4 Which colored arrows are incorrect based on the convection current patterns and plate movements below? Copyright © 2010 Ryan P. Murphy

5 Answer! The blue arrows. The plates should be moving toward each other.
Copyright © 2010 Ryan P. Murphy

6 Answer! The blue arrows. The plates should be moving toward each other.
Copyright © 2010 Ryan P. Murphy

7 Try Again! Which colored arrows are incorrect based on the convection current patterns and plate movements below? Copyright © 2010 Ryan P. Murphy

8 Answer! The purple arrows should be diverging instead of converging.
Copyright © 2010 Ryan P. Murphy

9 Answer! The purple arrows should be diverging instead of converging.
Copyright © 2010 Ryan P. Murphy

10 Try Again! Which colored arrows are incorrect based on the convection current patterns and plate movements below? Copyright © 2010 Ryan P. Murphy

11 Answer! The light grey arrows should be diverging instead of converging.
Copyright © 2010 Ryan P. Murphy

12 Answer! The light grey arrows should be diverging instead of converging.
Copyright © 2010 Ryan P. Murphy

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