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chapter 8 and 10

TermDefinition
earthquake moments of the ground due to sudden release of energy
focus point in earths interior where the earthquake occurred
seismic waves waves of energy released by an earthquake
epicenter point on earths surface difectly above the focus
elastic rebound sudden return of deformed rock back to unformed shape
body waves seismic waves that move through the inside of earth
p waves push pull body waves
s waves side to side waves
surface waves seismic waves that move on earths surface
seismograph all waves are recored on a seimograph
seismogram pen traces vibrations onto a moving drum of paper to crete a seismogram
richter scale numerical scale based on height of largest seismic wave magnitude
moment magnitude scale small shallow quakes
modified mercalli scale roman numeral scale that measures the intansity creating by an earthquake
liquefaction phenomeron sometimes assoicate with earthquakes in which soils and other materials come with water and turn into a liquid that is not supported
tsunami is a wave formed when the ocean floor shifts suddenly during a earthquake
seismic graph a graph that reads how big a earthquake is.
crust the thin , rocky outer layer of earth is divided into oceanic and continetal crust
mantle 82 percent of earths volume is contained in the mantle a solid , rocky shell.
outer core is a sphere having a radius of 1220 kilometers
inner core are compressed into a solid state by the immense pressure
moho short for mohorovicic discontinuity
ring of fire a major area in the basin of the pacific ocean
hot spot volcanic areas far from plate boundaries
viscosity the state of being thick, sticky, and semifuid in consistency
vent an opening as in a wall, an opening at the earths surface from volcanic material
pyroclastic material composed of rock fragments of explosive orgin
volcano opening vent that allows magma to escape to the surface
crater a crater thats in the ground bowl shape cavity in the ground or on the surface
shield volcano quiet eruptions of basaltic lava
cinder cone explosive eruption of grantic lava
composite volcano combination of forms lands
caldera a large volcanic crater typically one formed by a major eruption leading to the collaspe of the mouth of the volcano
lahar a destructive mudflow on the slopes of a volcano
pluton a body of a intrusive rock
sill a sheet of igneous rock intruede between and parallel with the existing strata
laccolith a mass of igneous rock typically lens shaped that has been intruded between rock.
dike a ditch or water course
batholith a very large igneous intrusion extending deep in the earths crust
Created by: 2007901
Popular Earth Science sets

 

 



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