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OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
OLM Science6_7
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OLM Science6_7

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Grade 6, Chapter 7

Grade 6, Chapter 7

Published in: Technology, Education
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Transcript

  • 1. Chapter 7 Earthquakes What are Earthquakes? Section 1
  • 2. Seismology <ul><li>The study of earthquakes </li></ul>
  • 3. Fault <ul><li>A break in the Earth’s crust along which the crust slide relative to one another </li></ul>Normal Thrust Strike-slip
  • 4. Deformation <ul><li>Change in the shape of a rock in response to stress </li></ul>
  • 5. Elastic Rebound <ul><li>Sudden return of elastically deformed rock </li></ul>
  • 6. Transform Motion <ul><li>Two plates slip past each other </li></ul>                     
  • 7. Strike-Slip Fault <ul><li>Blocks of crust slide past each other </li></ul>
  • 8. Convergent <ul><li>Occurs where two plates push together </li></ul>                            
  • 9. Reverse Fault <ul><li>Blocks of crust that are pushed together slide vertically </li></ul>
  • 10. Divergent Motion <ul><li>Two plates pull away from each other </li></ul>                     
  • 11. Normal Faults <ul><li>Block of crust are pulled away from each other slide vertically </li></ul>
  • 12. Seismic Waves <ul><li>Waves of energy that travel through the Earth </li></ul>
  • 13. P Waves <ul><li>Travel through solids liquids & gases. Fastest seismic waves (Primary Waves) </li></ul>
  • 14. S Waves <ul><li>Shear waves, second fastest seismic wave(Secondary Wave) </li></ul>
  • 15. Surface Waves <ul><li>Moves the ground up and down in circles as the waves travel along the surface </li></ul>
  • 16. Chapter 7 Earthquakes Earthquake Measurement Section 2
  • 17. Seismographs <ul><li>Instruments that record seismic waves </li></ul>
  • 18. Seismogram <ul><li>Tracing of an earthquake motion created by a seismograph </li></ul>
  • 19. Epicenter <ul><li>Point on the Earth’s surface directly above an earthquakes starting point </li></ul>
  • 20. Focus <ul><li>The point inside the Earth where the earthquake begins </li></ul>
  • 21. Finding the Epicenter <ul><li>A circle is drawn around 3 different seismograph station </li></ul>
  • 22. Richter Scale <ul><li>Tool used to measure the earthquake strength </li></ul>
  • 23. Chapter 7 Earthquakes Earthquakes and Society Section 3
  • 24. Earthquake Hazard <ul><li>How prone an area is to experiencing earthquakes in the future </li></ul>
  • 25. Strength & Frequency <ul><li>The weaker the earthquake the more often they occur </li></ul>
  • 26. Gap Hypothesis <ul><li>Sections of active faults that have few earthquakes are likely to be sites of strong earthquakes </li></ul>
  • 27. Seismic Gaps <ul><li>Areas along the fault where relatively few earthquakes have occurred </li></ul>
  • 28. Mass Damper <ul><li>Weight placed on the roof of the building </li></ul>
  • 29. Cross - Braces <ul><li>Braces placed between floors </li></ul>
  • 30. Flexible Pipes <ul><li>Prevent water & gas lines from breaking </li></ul>
  • 31. Base Isolators <ul><li>Act as shock absorbers during an earthquake </li></ul>
  • 32. Active Tendon System <ul><li>Works like damper system in the roof </li></ul>
  • 33. Chapter 7 Earthquakes Earthquake Discoveries near and Far Section 4
  • 34. Moho <ul><li>Space within the Earth where the speed of seismic waves increase sharply </li></ul>
  • 35. Shadow Zone <ul><li>Area on the Earth’s surface where no waves from a particular earthquake can be detected </li></ul>
  • 36. Inner Core <ul><li>Solid inner core </li></ul>
  • 37. Moonquakes <ul><li>Seismograph event on the moon </li></ul>
  • 38. Mars <ul><li>Space probe Viking I </li></ul>
  • 39. The Sun <ul><li>Seismic Waves </li></ul>

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