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Name _______________________________________ Date ______________ Period ________ Plate Tectonics Words to Know Define the vocabulary word and draw a picture or graphic illustrating the word. Word Definition Picture/Graphic/Example Convergent Boundary – formed where two sections of the Earth’s crust are colliding. Divergent Boundary – forms where two lithospheric plates are moving away from each other. Transform Boundary – The boundary between two lithospheric plates where the plates are sliding past each other. Tectonic Plate – one of the pieces of Earth’s rocky crust that rest and moves on semi-liquid mantle. Fault - A crack within Earth’s rocky crust, where rock has been fractured, and where rocks move past each other. Epicenter – the point on the Earth’s surface directly above the location of an earthquake. Plate Boundary – The region where two lithospheric plates meet. Mid-Ocean Ridge - An undersea mountain range that forms where two parts of the Earth’s crust are pushing apart. (a diverging plate boundary) Subduction - The process, in which one lithospheric plate slides under another, occurs at converging plate boundaries. Seismic Waves - a wave of energy passing through Earth, caused by an earthquake: includes P-waves, S-waves, and L-waves Uplift - The pushing up of the Earth’s crust by forces within Earth; such as the action of two lithospheric plates moving toward each other Volcanoes - A hill or mountain formed by material that erupts onto Earth’s surface caused by action of magma below. A Mountain formed by lava and ash. Convection Current – the transfer of thermal energy in a fluid (liquid or gas), in which warmer fluid rises and cooler fluid sinks. Focus - The point within the Earth where an earthquake took place. Magnitude – The strength or intensity of a property or event, such as the brightness of a star, or an earthquake.