The theory of plate tectonics states that the Earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet. Understanding Plate Tectonics - Chapter Summary. This chapter covers the essential topics related to plate tectonics. Students can learn about the theories of plate tectonics and continental drift. The theory of plate tectonics is a unifying theory for geology. Plate tectonics is crucial to our understanding about how all earth processes happen from the rock cycle to the building of mountains to volcanoes, to earthquakes, and more.. A unifying theory is the main theory that explains how a whole group of natural phenomenon come about.
Understanding volcanoes plate tectonics video
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