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Earthquake Vocab.

Science 7th

Earthquake Energy waves passing through Earth, Shift in fault line, Volcanic activity.
Crust Outer most, Rocky layer of Earth.
fault Crack within Earths crust layer
mantle Earths layer below the crust
lithosphere outer most layer of earths layer that is rocky and solid
plates one piece of earths crust
seismologist a scientist who studies earthquakes
epicenter the point on the earth's surface vertically above the focus of an earthquake.
Seismic waves an elastic wave in the earth produced by an earthquake or other means.
p-waves P-waves are a type of elastic wave, called seismic waves in seismology, that can travel through a continuum. The continuum is made up of gases, liquids, or solids, including the Earth. P-waves can be produced by earthquakes and recorded by seismographs
s-waves A type of elastic wave, the S-wave, secondary wave, or shear wave is one of the two main types of elastic body waves, so named because they move through the body of an object, unlike surface waves.
surface waves In physics, a surface wave is a mechanical wave that propagates along the interface between differing media, usually two fluids with different densities. A surface wave can also be an electromagnetic wave guided by a refractive index gradient.
seismograph an instrument that measures and records details of earthquakes, such as force and duration.
magnitude the great size or extent of something.
richter scale a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
mercalli scale a scale formerly used to describe the magnitude of an earthquake
moment magnitude scale a logarithmic scale of 1 to 10
tsunami a long high sea wave caused by an earthquake, submarine landslide, or other disturbance.
leiquefaction the conversion of a solid or a gas into a liquid
aftershock a smaller earthquake following the main shock of a large earthquake.
Base Isolators building attached to its foundation to prevent damage
shear core walls braced panels in the wall line using structural plywood sheathing with specific nailing at the edges and supporting framing of the panel.
tension ties connecting walls and floors to prevent damage
cross braces wood panels making an x on a wall to prevent damage
mass dampers a device mounted in structures to reduce the amplitude of mechanical vibrations.
flexible pipe a pipe that lets energy go through it and as it goes through it bends to prevent damage.
lithosphere outermost shell of a rocky planet defined on the basis of the mechanical properties.
Tension the state of being stretched tight.
compression the action of compressing or being compressed.
shearing break off or cause to break off, owing to a structural strain.
plateau an area of relatively level high ground
normal fault an inclined fault in which the hanging wall appears to have slipped downward relative to the footwall
reverse fault thrust fault: a geological fault in which the upper side appears to have been pushed upward by compression
strike slip fault a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault.
Created by: 1962111940