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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?
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