Across
- 1. When one plate is forced under another
- 3. This type of crust is more dense and will subduct in a collision
- 6. These waves are the fastest and can move through liquid and solid
- 8. The boundary where two plates collide
- 9. This is the tool used to measure the intensity of earthquakes
- 12. Fossil and age evidence helped proved this theory
- 14. The plates are gliding over the mantle
- 16. The origin of the earthquake
- 17. The crust and upper mantle comprises this
- 18. These waves are slower
Down
- 2. When two continental plates collide and the crust crumples upward
- 4. This plastic like layer is the upper portion of the mantle
- 5. Rift Valleys and ocean ridges are found at this boundary
- 7. Harry Hess used this feature to hypothesize seafloor spreading
- 10. This scale measures the amount of energy released in an earthquake
- 11. When two plates slide past each other you get these
- 13. When two continental plates converge these are formed
- 15. This type of volcano has sloped sides and basaltic magma