What causes continental drift and plate tectonics?

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Presentation transcript:

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

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

Copyright © 2010 Ryan P. Murphy

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

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

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

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

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

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

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

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

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