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Plate Tectonics 1-6

Vocab review for lessons 1-6 in Exploring Plate Tectonics

TermDefinition
Earthquake vibrations in the earth caused by the sudden release of energy
seismologist a scientist who studies earthquakes
P-wave a primary earthquake wave that travels through the body of the earth, first wave to reach a seismograph station
S-wave a secondary earthquake wave, second wave to reach a seismograph station
surface wave wave that travels on or near the surface of the earth
body wave an earthquake wave that travels through the body of the earth instead of on the surface
seismogram the record made by a seismograph
seismograph an instrument that detects, records, and measures the vibrations caused by earthquakes
aftershock an earthquake that follows after the main shock of an earthquake
epicenter the point on the surface of the earth that directly above the focus of an earthquake
focus the location where the rupture of an earthquake begins and energy is released
plate boundary a place where pieces of the broken lithosphere meet
Plate Tectonics the theory t hat the lithosphere is broken into segments, or "plates," that float on the asthenosphere
magnitutde a measure of the total amount of energy released at the focus of an earthquake
asthenophere the layer of the mantle that lies directly under the lithosphere and flows like taffy
lithosphere the crust and upper part of the mantle that is broken into segments, or plates
Created by: cynthiagardner