Earth Science Concepts

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core

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the innermost part of Earth, including the inner and outer core

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crust

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the outermost layer of Earth, made of oceanic and continental crust

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mantle

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the middle layer of Earth, containing molten magma

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lithosphere

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the rigid outer portion of Earth made of crust and uppermost mantle that is broken into plates

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asthenosphere

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the region within the mantle where convection currents occur

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oceanic crust

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dense crust made of basalt that forms ocean basins

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continental crust

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thick part of Earth's crust that supports landmasses

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continental drift

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the theory explaining that the continents have not always been in the same place on the planet

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plate tectonics

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the idea that the Earth's lithospheric plates move relative to each other due to convection currents in the asthenosphere

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Pangaea

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a supercontinent that existed millions of years ago before the Earth's continents moved to where they are today