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Words To Remember

Words and Definitions

QuestionAnswer
Epicenter Point of Earth's surface directly above on 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(normal fault),or shear(strikeslip fault).
Focus Point deep inside Earth where energy is released, cuasing an earthquake.
Lava Molten rock flowing onto Earth's surface.
Lithosphere Rigid layer of Earth about 100km thick,made of the crust and part of the upper mantle.
Magnitude A measure of the energy released by an earthquake.
Rifts Long crack,fissure,or through that forms between tectonic plates moving apart a plate boundaries.
Seismic Safe Describes the ability of structures to stand up aqainst the vibrations caused by an earthquake.
Seismic Waves Earthquake waves,including primary waves,secondary waves,and surface waves.
Surface Waves The slowest and largest of the seismic waves,and they cause most of the destruction during an earthquake.
Seismograph Instrument used to record seismis waves.
Tsunami Powerful seismic sea wave that bgins over an ocen-floor earthquake,can reach 30m in height when approaching land,and can cause destruction in coastal areas.
Volcanoes Cone shaped hill ormountain formed when hot magma,so lids,and gas erupt onto Earth's surface through a vent.
Pyroclastic Flow A hazard for inhabitants of mutserrat.
Richter Scale Magnitude is based on measurements of amplitudes or heights,of seimsic waves as recorded on seismographs.
Created by: ralex704
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