Across
- 1. slowest moving waves
- 3. the theory that proposes that Earths outer shell consist of individual plates that interact in various ways
- 6. how many types of surface waves
- 8. the amount of layers Earth is made up of
- 9. areas of low earthquake activity
- 12. the lateral movement of continents resulting from the motion of crustal plates
- 13. caused by a sudden release of energy when rocks move along a fault.
- 16. measures ground motion and can be used to determine determine the distance seismic waves travel
- 18. spot on surface above the focus
- 19. fastest waves that travel through liquids or gases
- 20. a long high sea wave caused by an earthquake
Down
- 2. location of first motion in Earth
- 4. what plates are made of
- 5. the strength of an earthquake
- 7. slower waves that travel through solids only
- 10. areas where no body waves are detected
- 11. refers to the deformation of the crust as a consequence of plate interaction
- 14. where plates slide past each other
- 15. small earthquakes that precede a large earthquake
- 17. the layer of earth we live on