Earthquakes
an instrument that detects earth waves
seismometer
Which force is this an example of: the force that a rock climber exerts on a rope as he rappels down a cliff?
tension
At what kind of boundary would subduction most likely occur?
convergent
property that allows a material to change shape without breaking under stress
ductility or elasticity
horizontal direction of a fault
strike
Where are most major faults in the U.S. found? (general landform)
mountain ranges
normal and reverse are kinds of this type of fault
dip-slip
secondary, smaller earthquakes that result from a major earthquake
aftershocks
an instrument that detects and records earth waves
seismograph
Where can seismic waves travel?
through the earth's surface, through the earth, and through the core
Rayleigh and Love waves are examples of this type of wave
surface waves
Which of these does not belong? (not part of locating an earthquake)
epicenter, focus, overthrust, epicenter
overthrust
Where are earthquakes most common on the earth?
plate boundaries
If one quake measures 4 on the Richter scale and aother measures 5, how does the 2nd quake's energy compare to the 1st quake?
2nd quake has 31.6 times more energy
Which of these does not belong?
Richter, Modified Mercalli Intensity scale, moment magnitude, Rayleigh
Rayleigh
ocean wave caused by an earthquake
tsunami
What part of the seismometer moves as earthquake waves pass by?
the mass does not move - the base of the recording system moves
What is the highest number on the Richter scale?
none - no upper limit for the magnitude of an earthquake
What kind of stress is most significan in causing earthquakes?
sheer
a crack in rock where movement occurs
fault
Name 3 causes of earthquakes
fault slipping
tectonic movement
volcano eruption
landslide
volcano
What are 3 hazards related to earthquakes?
building collapse
landslide
tsunami
fire
How many seismic stations are need to pinpoint and earthquake's epicenter?
3
The Modified Mercalli Intensity (MMI) scale rates earthquakes not on magnitude, but on this...
damage
A _____ (cannot be changed) is a source of danger, but a _______ ( can be reduced ore eliminated) is possibility of injury or death to people and damage.