Pangaea - A hypothetical supercontinent that includes all current land masses., Alfred Wegener - A German scientist who proposed a hypothesis about continental drift and Pangaea., Continental Drift - The slow movement of the continents across the earth's surface overtime., Tectonic Plates - Layer's of the earth's crust that move, float, and sometimes fracture. It can cause continental drift, earthquakes, volcanoes, mountains, and ocean trenches., Ring of Fire - It is in the Pacific Ocean where a large number of earthquakes and volcanic eruptions., Geologist - A scientist who studies the solid and liquid matter that constitutes the earth as well as the processes and history that have shaped it., Volcano - A mountain or hill, having a crater through, which lava, rock fragments, hot vapor, and gas erupting from the earth's crust., Continental Plate - One of the large pieces of the surface of the earth that move separately., Oceanic Plate - It is the uppermost later of the oceanic portion of a tectonic plate. The crust overlies the solidified and uppermost later of the mantle., Ocean Trenches - A long, narrow ditch on the ocean floor typically one running parallel to a plate boundary and marking a subduction zone., Ridge - A long narrow hilltop or mountain range., Subduction - The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate., Seismic Waves - An elastic wave in the earth produced by an earthquake or other earth vibration., Core - The central or innermost portion of the Earth, below the mantle., Mantle - The region of the interior of the Earth between the core and the crust., Crust - The top layer of the earth. It is composed of a great variety of igneous, metamorphic, and sedimentary rocks. , Lithosphere - The rigid outer part of the Earth. It is the crust and upper mantle of the earth., Convection Currents - Result from convective flow - where fluid moves in a continuous circular pattern of as they are heated and cooled.,

Plate Tectonics

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