chapter 6 Flashcards
earthquakes
what are three land features caused by tectonics plate movement
ocean basins, mountains, volcanos
where are earthquakes the strongest?
epicenter
what does ten-fold on the Richter scale mean? (ranged from _ to _)
1 to 10
a familiar system of reporting the magnitude or energy of an earthquake
Richter scale
in general, the size of intensity of some measurable quantity (measurement of an earthquake’s energy)
magnitude
a push or pull on an object
force
the first earthquake wave that reaches a seismic station from an earthquake
P waves
rapid mass wasting of earth materials downhill
landslide
the angle of slope of a fault face or stratum, measured from the horizontal plane to the fault or stratum surface
dip
forces or stresses acting in opposite directions on different parts of the same object or substance
shear stress
the point on the earth’s surface directly above the place within the earth where an earthquake actually occurs (it’s focus)
epicenter
the tool used to measure the strength of an earthquake
seismograph
any change in the shape of a solid due to stresses exerted on the material
strain
how do geologists classify faults?
by the way two blocks of rock moved to form the fault
the second earthquake wave that reaches a seismic station from an earthquake
S waves
a far-reaching, devastating water wave caused by seismic activity
tsunami
any force exerted on the matter in an object
stress