PLATE TECTONICS: Plate Tectonics are plates that move slowly over the underlying mantle.
CONTINENTAL DRIFT: Continental Drift is the gradual movement of the continents across the Earths surface through geological time.
PANGAEA: Pangaea is the super continent of when all other continents were once connected.
Asthenosphere: Asthenosphere is the upper layer of Earths mantle, below the lithosphere, in which there is relatively to plastic flow and convection is thought to occur.
LITHOSPHERE: Lithosphere is the rigid outer part of the Earths, consisting of the crust and upper mantle.
MID-OCEANIC RIDGE: Mid-Oceanic Ridge is an underwater mountain system that consists of various mountain ranges, with a valley running along is spine.
RIFT VALLEYS: Rift Valleys are formed on a divergent plate boundary, a crustal extension, a spreading apart of the surface.
SUBDUCTION: Subduction is one tectonic plate that moves under another tectonic plate and sins into the mantle as the plates converge.