Dynamic Earth Pre Vocabulary

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Continental Crust

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crust under the continent. Felsic. Less dense, thicker part of the lithosphere.

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Convection Currents

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Transfer of energy where warmer, less dense material rises, cools, and sinks back down, creating a cycle; driving force of crust movement.

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Convergent boundary

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A type of tectonic plate boundary where two plates come together, and the denser plate subducts.

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Subduction

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The process where one tectonic plate moves under another and sinks into the mantle.

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Continental-Oceanic Convergent Boundary

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Occurs when an oceanic plate converges with a continental plate, leading to subduction of the oceanic plate.

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Oceanic-Oceanic Convergent Boundary

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Occurs when two oceanic plates converge, often forming a trench and volcanic islands.

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Continental-Continental Convergent Boundary

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Occurs when two continental plates converge, leading to the formation of mountain ranges.

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Volcanic Arc

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A chain of volcanoes formed above a subducting plate, often associated with convergent boundaries.

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Oceanic Trench

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A deep underwater trench formed at an oceanic-oceanic convergent boundary.

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Lithosphere

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The rigid outer layer of the Earth, consisting of the crust and upper mantle.