Geosphere

Front

Earth's Layers

Back

Crust: Outermost layer, solid rock, forms tectonic plates. Mantle: Molten rock, convection drives plate movement. Outer Core: Liquid metal, generates Earth's magnetic field. Inner Core: Solid metal, source of geothermal energy.

Front

Pangaea

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The name of the giant ancient "supercontinent" when all landmasses were joined.

Front

Asthenosphere

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The flowing, dense layer of the mantle upon which the lithospheric plates rest. Means "weak sphere."

Front

O-C Convergent Boundary

Back

Oceanic plate subducts under continental. Forms a deep-ocean trench and volcanic arc (onshore).

Front

Mid-Ocean Ridges

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Formed by divergent boundaries through seafloor spreading.

Front

Mountain Ranges

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Formed by collision at continental-continental convergent boundaries.

Front

Seafloor Spreading

Back

Process occurring at mid-ocean ridges where new oceanic crust is formed.

Front

Crust

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The outermost layer of the Earth.

Front

Collision

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Process at convergent boundaries where plates move toward each other.

Front

Plate Tectonics

Back

Theory explaining the movement of Earth's plates and associated phenomena.