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Earth science

TermDefinition
Earthquakes vibrations in the ground that result from movement along breaks in earth's lithosphere.
Fault a break in Earth's lithosphere where one block of rock moves toward, away from, or past another.
Seismic Waves Energy that travels as vibrations on and in Earth called.
Focus seismic waves originate where rocks first move along the fault, at a location inside Earth.
Epicenter the location on Earth's surface directly above the earthquake's focus.
Primary Waves also called P-Waves cause particles in the ground to move in a push-pull motion similar to a coiled spring.
Secondary Waves also called S-Waves they cause particles to move up and down at right angles relative to the direction the wave travels.
Surface Waves cause particles in the ground to move up and down in a rolling motion.
Seismologists scientists that study Earthquakes.
Seismometer measures and records ground motion and can be used to determine the distance seismic waves travel.
Volcano a vent in Earth's crust through which melted or molten rock flows.
Magma molten rock below Earth's surface.
Lava molten rock that erupts onto Earth's surface.
Hot Spots Volcanoes that are not associated with plate boundaries
Shield Volcanoes common along divergent plate boundaries and oceanic hot spots.
Created by: mglundy
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