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Chapter 8 and 10 voc

TermDefinition
Earthquake Movements of the ground due to sudden release of energy.
Focus The point within Earth where an earthquake starts.
Seismic waves Waves of energy released by an earthquake.
Epicenter Is the location on the surface directly above the focus.
Elastic rebound Sudden return of deformed rock back to undeformed shape.
Body waves Seismic waves that move through the inside (body) of Earth.
P waves Push-Pull wave body waves.
S waves Side-to-Side body waves.
Surface waves It travels across the surface of the Earth as opposed to through it.
Seismograph Where all seismic waves are recorded.
Seismogram Pen traces vibrations onto a moving drum of paper.
Richter Scale Numerical scale ( 1-?) based on height of largest seismic wave (magnitude).
Moment Magnitude Scale Is used by seismologists to measure the size of earthquakes.
Modified Mercalli Scale Roman numeral scale ( I - XII ) that measures the intensity (ground shaking) created by an earthquake.
Liquefaction Where soil and rock are saturated with water, earthquakes can cause a process.
Tsunami Is a wave formed when the ocean floor shifts suddenly during an earthquake.
Seismic gap Is an area along a fault where there has not been any earthquake activity for a long period of time.
Crust The thin, rocky outer layer of Earth, is divided into oceanic and continental crust.
Mantle A solid, rocky shell that extends to a depth of 2890 kilometers.
Outer core Is a liquid layer 2260 kilometers thick.
Inner core Is a sphere having a radius of 1220 kilometers.
Moho Mohorovicic - the name of the boundary is shortened.
Ring of Fire Where many different plates meet.
Hot spot Volcanic areas far from plate boundaries.
Viscosity A substance's resistance to flow.
Vent An opening to the surface that allows magma to escape.
Pyroclastic material Particles produced in volcanic eruptions.
Volcano Opening that allows magma to escape to the surface.
Crater Located at the summit of many volcanoes is a steep-walled depression.
Shield Volcano Produced by the accumulation of fluid basaltic lava.
Cinder cone Ejected lava fragments that harden in the air.
Composite volcano Is a large, nearly symmetrical volcanic mountain composed of layers of both lava and pyroclastic deposits.
Caldera Is a depression in a volcano.
Lahar Occurs when water-soaked volcanic ash and rock slide rapidly downhill.
Pluton The structures that result from cooling and hardening of magma beneath Earth's surface.
Sill Is a pluton that forms where magma forms between parallel layers of sedimentary rock.
Laccolith A lens-shaped pluton that has pushed the overlying rock layers upward.
Dike A pluton that forms when magma into fractures that cut across rock layers.
Batholith A body of intrusive igneous rock that has a surface exposure of more than a 100 square kilometers.
Created by: 3000702
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