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E and V Vocabulary

vocabulary words and definitions

QuestionAnswer
Epicenter- point on earth's surface directly above an earthquake's focus.
fault- fracture that occurs when rocks break and that results in relative movement of opposing sides; can form as a result of compression,(reverse fault,being pulled apart, or shear.
focus- point deep inside earth where energy i released,causing an earthquake
lava- molten rock flowing onto eath's surface
lithosphere- rigid layer of earth about 100 km thick/ made of the crust and a part of the upper mantle
magnitude- a measure of the energy released by an earthquake.
rifts- long cracks, fissure, or through that forms between tectonics plates moving apart at plate boundaries.
seismic safe- describes the abitity of structures to stand up against the viberations caused by an earthquake.
seismic waves- earthquake waves, including primary waves, secondary waves, and surface waves
surface waves- are the slowest and largest of the seismic waves.
seismograph- instrument used to record seismic waves.
tsunami- powerful seismic sea wave that begins over an ocean-floor earthquake, can rach 30 miles in height when approching land, and can cause destruction in coastal areas.
volcanoes- cone shaped hill or moutain formed when hot magma, solids, and gas erupt onto Earth's surface through a vent.
pyroclastic flow- massive avalanches of hot glowing rock.
richter scale- based on measurements of amplitude, or heights, of seismic waves as recored on seismographs.
Created by: Wendy94704
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