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3.1 Vocabulary
Layers of the Earth
Term | Definition |
---|---|
asthenosphere | the soft layer of the mantle on which the lithosphere floats |
basalt | a dark, dense, fine-textured rock found in the oceanic crust |
crust | the layer of rock that forms Earth's outer surface |
granite | a usually light-colored igneous rock that is found in the continental crust |
inner core | a dense sphere of solid iron and nickel at the center of the Earth |
lithosphere | a rigid layer made up of the crust and uppermost part of the mantle |
mantle | the layer of hot, solid material between Earth's crust and core |
outer core | a layer of molten iron and nickel that surrounds the inner core of Earth |
pressure | the force exerted on a surface divided by the total area over which the force is exerted; force/total area |
seismic waves | vibrations that travel through Earth carrying the energy released during an earthquake |