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earthquakes

QuestionAnswer
fault break in rock in the crust where rock slide past each other
mantle a layer of hot rock
lithosphere the uppermost part of the mantle and the crust together form a rigid layers
lithosphere plate can be either continental or oceanic, thick and less dense than oceanic plates
crust is the layer of rock that forms Earths outer skin
earthquake plate movement
comprehention squeezes rock until it folds or breaks
convergent two plate boundaries colliding with each other
divergent two plate boundaries that pull apart making a trench
transform grind past one another
subdution when one plate moves under another
focus the at which a rock under stress breaks and triggers an earthquake
convection heat transfer by the movement of currents within fluids
swave vibrate from side to side and up and down
pwave cause buildings to contract and expand, compress and expand the ground like an accordian
epicenter the point on the surface of the earth that is directly above the focus
surface wave produces the most ground movements
aftershock a earthquake that happens after the first earthquake
tsunami a big wave
liqurfaction when an earthquake violently shakes loose earth and turns into liquid mud
magnitude the number that geologist give to an earthquake based on the earthquakes strength
moment magnitude a rating system that estimates the total energy released by an earthquake.
Richter scale rating of an earthquakes magnitude based on seismic waves
mercalli scale developed to rate earthquake according to the level of damage given to a level of place
reverse fault The hanging wall slides up and over the footwall
normal fault the hanging wall slips downward below the footwall
shearing pushes rocks past eachother, rock folds or breaks
plateu a large area of rock above sea level
tension pulls rock away from eachother, stretch rocks
compresion pushes rock in tow different directions, pushes rock into each other
seismograph records ground movements caused by seismic waves as they move through the Earth
seismology study of earthquakes
Created by: 1962856844
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