Term Definition
Continental drift The hypothesis that states that the continents once formed a single landmass broke up and drifted to their present location
Sea-floor spreading
Plate tectonics The theory that explains how large
Convergent boundaries
Divergent boundaries
Convection currents
A supercontinent
The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies
Boundaries formed by coliding of tectonic plates
Boundaries formed by dividing of tectonic plates
Boundaries formed by sliding past one another
Volcanoes ????
The movement of matter due to differences in density
Wegner Alfred wegner is he man known for his theory/ hypothesis of continental drift
Volcano A vent or fissure in the earths surface through which magma and gasses are expelled
Hot spots A volcanically active area of earths surface far from a tectonic plate boundary
Mid ocean ridges A long undersea mountain chain that forms along the floor of the major oceans
Subduction When 2 tectonic plates converge one is forced under the other
Vent An opening at the surface of the earth through which volcanic material passes
Plate tectonics

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