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Chapter 8 & 10 vocab
| Term | Definition |
|---|---|
| Earthquake | vibration of Earth produced by the rapid release of energy |
| focus | point within Earth where an earthquake originates |
| seismic waves | vibrations that travel through Earth carrying the energy released during an earthquake |
| epicenter | location on Earth's surface directly above the focus, origin, of an earthquake |
| elastic rebound | explanation of how energy is released during an earthquake |
| body waves | seismic waves that moves through the interior of Earth |
| P waves | longitudinal earthquake wave that travels through interior of Earth |
| S waves | transverse earthquake wave that travels through interior of Earth |
| surface waves | seismic wave at Earth's surface |
| seismograph | instrument that scientist use to measure strength of an earthquake |
| seismogram | record of ground movement |
| Richter Scale | a base of 10 scale in order to cover huge ranges of earthquakes |
| Moment Magnitude Scale | |
| Modified Mercalli Scale | |
| liquefaction | where soil and rock are saturated in water |
| tsunami | a wave formed when the ocean floor shifts suddenly during an earthquake |
| seismic gap | an area along a fault where there has been any earthquake activity in a long time |
| crust | thin rocky outer layer of earth |
| mantle | solid rocky shell extends to a depth of 2800 kilometers |
| outer core | liquid layer 2,260 kilometers thick |
| inner core | sphere having a radius of 1220 kilometers |
| Moho | boundary that separates the crust and from the underlying mantle |
| Ring of Fire | Ocean where there are many earthquakes |
| hotspot | volcanic areas far from plate boundaries |
| viscosity | |
| vent | |
| pyroclastic material | |
| volcano | opening vent that allows magma to escape to the surface |
| crater | top of a volcano vent |
| shield volcano | quiet eruptions of basaltic lava |
| cinder cone | explosive eruptions of granitic lava |
| composite volcano | combo of cinder and shield voolcanos |
| caldera | when magma chambers empties, cones can collapse |
| lahar | |
| pluton | structures from cooling and hardening of magma beneath earth |
| sill | pluton that forms where magma flows through parallel sedimentary rocks |
| laccolith | lens shaped pluton that has pushed overlaying rock layers upward |
| dike | |
| batholith |