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Quakes And Volcanoes

Earthquake and Volcano terms and definitions

QuestionAnswer
Epicenter Point of Earths surface directly above an earthquakes focus.
Fault Fracture that occurs when rocks break and that results in relative movement of opposing sides.
Focus Point deep inside Earth where energy is released, causing an earthquake.
Lava Molten rock flowing onto earths 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 crack, fissure, or through that forms between tectonic plates moving apart at plate boundaries.
Seismic Safe Describes the ability of structures to stand up against the vibrations caused by an earthquake.
Seismic Waves Earthquakes waves, including primary waves, secondary waves, and surface waves.
Surface Waves Slowest and largest of the seismic waves.
Seismograph Instrument used to record seismic waves.
Tsunami Powerful seismic waves that begins over an ocean floor earthquake, can be reached 30m in height when approaching land, and cause destruction in coastal areas.
Volcanoes Cone shaped hill or mountain formed when hot magma , solids, and gas erupt onto Earth's surface through a vent.
Pyroclastic Flow Another hazard for inhabitants of Montserrat.
Richter Scale The amplitude of the highest record of seismic wave.
Created by: igor704
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