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| The theory that the lithosphere is made of plates that move and interact with each other at their boundaries. |
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| A hypothesis that Earth's continents move on Earth's surface. |
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| A long chain of mountains with a central rift valley that is located along a divergent boundary. |
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| A boundary between two lithospheric plates that are moving apart. |
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| A deep valley at a point where lithospheric plates are moving apart, such as at a mid-ocean ridge. |
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| A crack or opening in Earth's crust. |
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| A boundary between two plates that are moving towards each other, or converging. |
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| A convergent boundary where an oceanic plate is plate is plunging beneath another, overriding plate. |
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| A long, narrow, steep sided trough, that runs parallel to continental margins or to volcanic island chains. |
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| A convergent boundary where two continents have come together and are welded into a single larger continent. |
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| A boundary between two plates that are sliding past each other. |
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| A process by which heat from Earth's inner and outer cores is transferred through the mantle. |
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| A force that is exerted by cooling, subsiding rock on the spreading lithospheric plates at a mid-ocean ridge. |
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| A force at a subduction boundary that the sinking edge of the subducting plate exerts on the rest of the plate |
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| The name of a hypothetical landmass consisting of all the continents welded together. |
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| The ancient core of a continent which is tectonically stable. |
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| A large block of lithospheric plate that has been moved, often over a distance of thousands of kilometers, and attached to the edge of a continent. |
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