2. Bellwork Clear everything off your desk except: P/P
Vocabulary Notebook
Finished Make-Up work
Label the next entry as “Earthquakes”
Wait P & Q

3. Earthquakes Vocabulary

4. Earthquakes
– Shaking of the ground by the sudden movements of tectonic plates at a fault
Most common along plate boundaries

5. Stress
– The force when two objects (tectonic plates) press, pull or push against one another

6. Fault
– A fracture or break in the lithosphere where tectonic plates move past one another
Classified by how rocks move
Three Kinds:
Normal
Reverse
Strike-Slip

7. Normal Fault
– When the rock above the fault plane moves down, common near divergent boundaries
Animation

8. Reverse Fault
– When the rock above the fault plane moves upward, common near convergent boundaries
Animation

9. Strike-Slip Fault
– When the rock moves sideways against one another, common near transform boundaries
Animation

10. Seismic Waves – Vibrations caused by Earthquakes Two Types:
Primary Waves ( P waves )
Secondary Waves ( S waves )

11. Primary Waves
– Fastest waves released by an earthquake; can travel through solids, liquids & gasses
Move back and forth as they travel

12. Secondary Waves
– Slowest waves released by an earthquake; can only travel through solids
Move up and down as they travel

13. Seismograph
– Records ground movements before, during and after an earthquake
Can be used to help predict an earthquake

14. Focus
– Place below ground where an earthquake starts

15. Epicenter
– Point on Earth’s surface directly above the focus

16. Aftershock
– A smaller earthquake that follows a larger one in the same area

17. Earthquake Video Clip
Shocking Earthquake Footage

18. Reaction … What do you think you would do? How would you react?
How would feel?
… During and after an EaRtHqUaKe