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Plate Tectonics

QuestionAnswer
Asthenosphere The soft layer of the mantle on which the lithosphere floats
Convergent Moving toward
Divergent Going in different directions
Epicenter Point on Earth's surface directly above an earthquake's focus
Focus Point at the depth where the rocks ruptured to produce earthquakes; place where quake waves originate
P-Wave A type of seismic wave that compresses and expands the ground.
S-wave A type of seismic wave that moves the ground up and down or side to side
Tectonics The branch of geology dealing with the rocks that make up Earth's crust
Tsunami A giant wave usually caused by an earthquake beneath the ocean floor.
Crust Earth's outermost layer.
Trench form when one tectonic plate slides beneath another plate at a subduction zone. Deepest part of the ocean floor.
Mid Ocean Ridge An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
Lithosphere A rigid layer made up of the uppermost part of the mantle and the crust.
Subduction One plate going under another plate
Continental the relatively thick part of the earth's crust that forms the large landmasses. Crust that is granitic and less dense.
Oceanic the relatively thin part of the earth's crust that underlies the ocean basins. Crust that is basaltic and more dense.
Created by: echmielowiec
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