Plate tectonics

Term Definition
Continental drift The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their preSent location.
Pangaea When the earth was all one part but now is split apart.
Sea floor spreading The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.
Plate tectonics The theory that the Eartha??s lithosphere is divided into tectonic plates that move around on top of the asthenosphere.
Converging boundary Is when two tectonic plates collide with each other.
Divergent boundary When two tectonic plates separated.
Transform boundary When two tectonic plates slide past each other.
Convention currents The move
Wegener Made many observations before proposing his hypothesis of continual drift.
Volcano A vent or fissure in the earths surface through which magma an d glass are expelled
Hot spot


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