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Vibrations that travel through Earth carrying the energy released during an earthquake.
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Seismic Waves
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The force exerted on a surface divided by the area over which the force is exerted.
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Pressure
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The layer of rock that forms Earth's outer surface.
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Crust
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A dark, dense, igneous rock with a fine texture, found in oceanic crust.
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Basalt
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A usually light-colored igneous rock that is found in continental crust.
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Granite
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The layer of hot, solid material between Earth's crust and core.
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Mantle
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A rigid layer made up of the uppermost part of the mantle and the crust.
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Lithosphere
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The soft layer of the mantle on which the lithosphere floats.
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Asthenosphere
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A layer of molten iron and nickel that surrounds the inner core of Earth.
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Outer Core
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A dense sphere of solid iron and nickel at the center of Earth.
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Inner Core
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The transfer of energy through space.
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Radiation
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The transfer of heat within a material or between materials that are touching.
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Conduction
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The transfer of heat by movement of a fluid.
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Convection
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The amount of mass in a given space; mass per unit of volume.
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Density
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The movement of fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another.
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Convection Current
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