Question Answer Hi
Plate Tectonics The theory of plate movement.
Sea-floor Spreading Is the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.
Pangaea A supercontinent.
Continental Drift The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.The theory of plate movement.
Divergent Boundary When two tectonic plates separate.
Convergent Boundary When two tectonic plates collide.
Convection Currents The changing of denssity in circular motions that move tectonic plates.
Transform Boundary When two tectonic plates slide past each other.
Alfred Wegener He came up with the hypothesis of continental drift.
Volcano Areas of the Earths surface through which magma and volcanic gases pass.
Hot Spot Are volcanically active places on the earth surface that are far from plate boundaries.
Mid-Ocean Ridges A long, undersea mountain chain that forms along the floor of the major oceans.
Subduction The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
Vent An opening at the surface of the earth through which volcanic material passes.
Plate Tectonics

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