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earthquakes
earthquakes ch.2 lesson 2
| Question | Answer |
|---|---|
| earthquake | a sudden and violent shaking of the ground sometimes can cause destruction |
| crust | form into a harder outer layer |
| fault | a crack in a rock along which slippage has occured |
| mantle | the region of the interior of the Earth between the core |
| lithosphere | hard rigid outer layer of the earth |
| lithospheric plates | divided into a number of crustal plates |
| siesmoligists | scientific study of earthquakes |
| p-waves | a longitudinal earthquake wave that travels through the interior |
| s-waves | a downward deflection of the QRS complex |
| surface waves | a seismic wave that travels that travels across the surface |
| focus | central point as attraction attention or activity |
| epicenter | the point Earth's surface directly above an earthquakes focus |
| richter scale | measures magnitude out of the earthquakes |
| moment-magnitude | measures the total energy released from earthquake |
| mercalli scale | measuring the intensity of an earthquake |
| seismic waves | an elastic wave in earth produced by an earthquake |
| magnitude | the great size or extent of something |
| seismograph | an instrument that measures and records details |
| liquefaction | a phenomenon in which the strength and stiffness |
| aftershock | a smaller earthquake following the main shock of a large earthquake |
| Tusunami | long high sea wave |
| base isolater | is meant to enable a building or non structure to survive |
| shear core walls | center of a large building |
| tension ties | eyebar guy-wire suspension cables |
| cross bracing | is a system utilized to reinforce building |
| mass damper | reduces amplitude of mechanical vibrations |
| flexible pipe | is characterized by a compsite construction |