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Vibrations that travel through Earth carrying the energy released during an earthquake.
The movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another.
The name of the single landmass that broke apart 200 million years ago and gave rise to today's continents.
A device that determines the distance of an object under water by recording echoes of sound waves.
A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
The process by which oceanic cus sinks beneath a deep-ocean trench and back into the mantle at a converent plate boundary.
A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
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