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Transcript
Tectonic plates Matter that is not exactly solid and not exactly liquid, but is still able to flow. Crust An area where many earthquakes occur and where there is frequent volcanic activity. Mantle Hot molten rock released onto the surface of the Earth’s crust that solidifies to form new layers of rock. Is composed mainly of Fe. Outer core Inner core Are produced when hot, molten rock forces its way to the surface. Subduction The region on the crust where two tectonic plates meet. Earthquakes Rips in the crust caused by tectonic plates moving away from each other. Pacific Ring of Fire Produced when tectonic plates move suddenly. Volcanoes Hot, molten rock underneath the surface of the crust. Magma Caused by the intense heat of the core causing material in the mantle to rise. Lava The thin, solid layer of the Earth. Plate boundaries An area under the crust where one tectonic plate slides under another. Ocean trenches A layer of the Earth which is molten. Earth’s magnetic field Movement in this layer causes the tectonic plates to move. Convection currents Large pieces of the crust. Plastic Assumed to be caused by the inner core spinning at a different speed to the rest of the earth.