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unit 2 lesson 6,7 v

TermDefinition
EARTHQUAKES ARE ground movements that occur when blocks of rock in earth move and suddenly
FOCUS the crust along witch blocks of rocks of rock move
TECTONIC PLATE BOUNDARY The plates can be moving toward each other away from each other or past each other
FAULT is an opening in the crust
DEFORMATION the action or process of changing in shape or distorting, especially through the application of pressure.
ELASTIC REBOUND As rocks on opposite sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their internal strength is exceeded.
VOLCANO a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
MAGMA hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling.
LAVA hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
VENT opening in a volcano
HOT SPOT A small area or region with a relatively hot temperature in comparison to its surroundings.
EPICENTER the point on the earth's surface vertically above the focus of an earthquake.
TECTONIC PLATES the two sub-layers of the earth's crust ) hat move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches
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