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Science

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Spreading and Subducting Can Move Continents

Run Time: 00:01:58

One mystery that intrigued geographers centuries ago is why Africa and South America seem to have matching coastlines. We see how the opening of the Atlantic Ocean between two tectonic plates at a spreading ridge separated the two continents. Using the Pacific plate as an example, geoscientist Chuck Blay of Teok Investigations discusses the amount of time it takes for rock to move from a ridge to a subduction zone. Featured Scientists: Chuck Blay, Ph.D., Keith Klepeis, Ph.D., Andy Kurtz, Ph.D., Michael Manga, Ph.D., and David Sherrod, Ph.D.

Standards

NSES Standard

Grades 5-8 Standard D. Crustal plates constantly move in response to the movements of the mantle.


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