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Earthquakes and Volcanoes

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Earthquakes and Volcanoes Chapter 8 Section 1, pp. 224 - 229 Chapter 9 Section 3, pp. 260 - 265 Standard: The relationship between movement of the tectonic plates and ... – PowerPoint PPT presentation

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Title: Earthquakes and Volcanoes


1
Earthquakes and Volcanoes
  • Chapter 8 Section 1, pp. 224 - 229
  • Chapter 9 Section 3, pp. 260 - 265
  • Standard The relationship between movement of
    the tectonic plates and major geologic events,
    such earthquakes and volcanoes

2
Warm Up
  • Explain the 3 types of faults.

3
EQ What causes earthquakes?
  • Seismology
  • Fault
  • Deformation
  • Elastic Rebound
  • Study of earthquakes
  • Break in the Earths crust along which blocks of
    crust slide
  • Change in shape of a rock due to stress
  • Sudden return of a broken, deformed rock
  • Energy released as seismic waves

4
EQ What are the 3 kinds of faults?
  • Strike-Slip Fault
  • Reverse Fault
  • Transform motion of boundary
  • 2 Plates slip past each other horizontally
  • Convergent motion of boundary
  • Blocks push together, against each other

5
  • Normal Fault
  • NOTE
  • Divergent motion of boundary
  • Blocks pull away from each other
  • Not all faults are located at plate boundaries
  • Faults can happen along faults in the middle of a
    plate

6
EQ How do earthquake waves travel?
  • Seismic waves
  • P Waves
  • A wave of energy that travels through the Earth
    away from an earthquake in all directions
  • A seismic wave that causes particles of rock to
    move in a back and forth motion.

7
Waves Continued
  • S Waves
  • Body Waves
  • Surface Waves
  • A seismic wave that causes particles of rock to
    move in a side to side direction.
  • Travel through Earths interior
  • Travel along Earths surface

8
EQ How are earthquakes measured?
  • Seismograph
  • Seismogram
  • Epicenter
  • Focus
  • Instrument that records seismic waves
  • A tracing of earthquake motion that is created by
    a seismograph
  • The point on Earths surface directly above an
    earthquakes starting point
  • The starting point along a fault

9
  • Richter Magnitude Scale
  • Measure the strength of an earthquake on a 0 to
    10 scale.
  • Measure ground motion or magnitude (strength)
  • For each 1 unit of magnitude , ground motion
    increases 10 times

10
  • Intensity of an Earthquake
  • A measure of the degree to which an earthquake is
    felt by people and the amount of damage caused.

11
Summary
  • What do you think is the reason Georgia does not
    have many earthquakes?

12
Ticket out the Door
  • Which wave is most damaging? Explain and support
    your answer.
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