science5
Terms
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- the study of earthquakes
- siesmology
- a break in the earths crust along which blocks of the crust slide relative to one another
- fault
- the change in the shape of rock in response to stress
- deformation
- rocks of the crust bend and change shape without breaking
- plastic deformation
- occurs when rock is streched beyond its breaking point
- elastic deformation
- the sudden return of elastistically deformed rock to its original shape
- elastic rebound
- differ in strength and in depth at which they begin
- earthquakes
- energy released by earthquakes that travel in waves
- seismic waves
- seismic waves tha travel through the earths interior
- body waves
- what are the two types of body waves
- s and p
- siesmic waves that travel along the earths surface
- surface waves
- primary waves "pressure waves" fastest seismic wave can travel through solids, liguids, and gases
- p waves
- secondaary waves "shear waves" 2nd fastest seismic wave CANT travel though liquids
- s waves
- move the ground up and down
- surface waves
- a device used to detect seismic waves
- seismograph
- a tracing of earthquake motion created by a seismograph used to determine the epicenter of waves
- seismogram
- the point on the earths surface directly ABOVE the earthquakes starting point
- epicenter
- the point INSIDE the earth where an earthquake begins
- focus
- seismomologist collect and compare seismograms from 3 seperate seismographs
- s p time method
- what is another name for the s p time method
- triangulation
- american seismologist who in the 1930s developed a scale used to measure earthquake intensity
- Charles Richter
- measures how prone an area is to experience earthquakes in the future
- earthquake hazard
- states that sections of active faults that have had relativly few earthquakes are likely to be sites of strong earthquakes in the future
- gap hypothesis
- the areas along a fault where relativly few earthquakes have occured
- seismic gap
- technologyu is used to design and construct buildings and bridges capable of withstanding earthquakes
- earthquake resistant buildings
- a weight placed in the roof of the building
- mass damper
- placed between floors to counteract pressures that push and pull the side of a building during an earthquake
- cross braces
- found in the basement and works like the mass damper
- active tendon system
- help prevent water and gas lines from breaking
- flexible pipes
- found in the foundation and act as shock absorbers
- base isolators
- the boundary between the earths crust and mantle
- moho
- part of the core discovered in 1936
- inner core
- the area on the earths surface where no direct seismic waves from an earthquake can be detected
- shadow zone
-
seismoraph place there in 1969
(other cosmic bodies) - the moon
- Viking1 boght a seismograph here in 1976 (other cosmic bodies)
- mars
- how many mars quakes have been detected?
- 1
- the information satellite SOHO seismic activity following soloar flares
- sun
- what is an earthquake on the sun called
- sunquake
- what is an earthguake on the moon called
- moon quakes
- what is an earthquake on mars called
- mars quake
- what is much more powerful and earthquake or sunquake
- sunquake