Use the Web to learn more about plate tectonics. What global changes might accompany the formation and breakup of a supercontinent? How might these changes affect the evolution of life? What...

Use the Web to learn more about plate tectonics. What global changes might accompany the formation and breakup of a supercontinent? How might these changes affect the evolution of life? What life-forms dominated Earth when Pangaea existed some 200 million years ago and also when fragments of the preceding supercontinent were as dispersed as today’s continents?