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6. What kind of particle movement occurs in P-waves?

  • An up and down movement
  • Contractions and expansions
  • A sideways movement at a right angle to the wave's direction of travel

7. Why do earthquakes occur at constructive plate margins?

  • Because the pressure built up from the sinking of the subducting plate is periodically released
  • Because of the friction and pressure caused by the plates moving apart
  • Because the plates stick together while moving past eachother. Stresses and pressure build

8. Why do earthquakes occur at destructive plate margins?

  • Because the plates stick together while moving past eachother. Stresses and pressure build
  • Because the pressure built up from the sinking of the subducting plate is periodically released
  • Because of the friction and pressure caused by the plates moving apart

9. Stage 5 of the Mercalli sale is...

  • Felt by everyone, many objects moved
  • Felt by people indoors
  • Some structural damage
  • Felt by most people, dishes and windows broken
  • Felt by many people, dishes and windows rattle
  • Heavy structural damage
  • All buildings damaged, many destroyed
  • Total destruction
  • Most buildings destroyed
  • Massive structural damage, some buildings destroyed
  • Only detected by instruments
  • Only felt by people at rest indoors

10. Which type of wave can travel through water and causes tsunamis?

  • P-waves
  • S-waves
  • L-waves

11. Why do earthquakes occur at conservative plate margins?

  • Because the plates stick together while moving past eachother. Stresses and pressure build
  • Because the pressure built up from the sinking of the subducting plate is periodically released
  • Because of the friction and pressure caused by the plates moving apart

12. What does the logarithmic nature of the Richter scale mean?

  • It does not increase regularly
  • That for every increase of one, the intensity of the earthquake is increased ten times
  • That for every increase of one, the intensity of the earthquake is increased by one

13. Is the epicentre on the surface or underground?

  • On the surface
  • Underground
  • Neither

14. What kind of particle movement occurs in an S-wave?

  • Contractions and expansions
  • A sideways movement at a right angle to the wave's direction of travel
  • An up and down movement