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Theory of Plate Tectonics

Plate tectonics theory predicts the locations of earthquakes, volcanoes, mountain ranges, ore deposits and other geological phenomena.

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Plate Tectonics and Theory of Plate Tectonics

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Plate Tectonic Motions 

Plates cover Earth's like a broken egg shell: pieces that together blanket Earth.

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Remember! Plates move because of the convection cell that is created within the mantle, which creates seafloor spreading. Where does seafloor spreading occur geographically?


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Plate Tectonic Theory

Plates are made of lithosphere that is topped with oceanic crust. Explain how crust is formed, from convection in mantle pushing seafloor spreading to crust being pulled back into the mantle. Use the diagram below for guidance if needed.

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[Figure1]

Plate Boundaries

When two plates meet, it is considered a plate boundary. Once they meet, they may move in three different ways. Name and describe each boundary.


Geological activity is common around plate boundaries. However, the type of activity is dependent on characterisitics about the plate boundary. What are they characteristics?

What the Theory Explains

The Theory of plate tectonics explains why Earth's geography changes and continues to change, and why some areas have more earthquakes or more active volcanos than others. Name four more occurances that are explained by the theory of plate tectonics.

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