Plate Tectonics

In 1965, five years after Harry Hess and Robert Diaz proposed that the seafloor was spreading, another scientist named John Wilson introduced a new theory he called Plate Tectonics. In this interactivity, you will learn that Wilson's theory expanded on the previous theories of Continental Drift and Seafloor Spreading to explain more accurately and conclusively how the seafloor spreads, how the continents move, and the importance of isostatic equilibrium. Click the player button to get started.

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Plate Tectonics Review

Now that you have explored Plate Tectonics, check your knowledge. In this non-graded interactivity, follow the instructions on each question slide. Click SUBMIT to check your response. Click the player button to begin.