Tectonic Plates to Mountains!

4. Instrument used to measure earthquakes; must be attached to the bedrock.
6. An upward folding of rock; results in an "A" like shape.
7. Smaller earthquakes that occur after the initial large seismic wave.
10. Two plates pulling apart.
13. These large waves of water happen because of an earthquake in the ocean.
16. He first proposed the theory of continental drift.
18. A Canadian scientist that contributed to our understanding of plate movement.
20. When two plates collide, one is pushed under the other here.
22. Layer of the earth located right below the crust.
23. When the Earth's layers are too brittle to fold they break or ______.
24. This layer is made of nickel & iron.
26. Two plates pushing together.
27. These waves are the slowest of the 3 & do the most damage.

1. We have large deposits of this in Alberta, even though we are no longer a wet, tropical area.
2. These instruments, carried by ships, were used to prove that the sea floor was spreading.
3. Sound wave technology used to prove that mountain ranges existed on the ocean floor.
4. A downward folding or rock; results in a "U" like shape.
5. This type of wave travels more slowly than P waves
8. The volcanoes and earthquakes that circle the Pacific Ocean are referred to as this.
9. Currently the youngest and highest mountain range on Earth.
11. This is the location on the Earth's crust directly above the focus.
12. The very middle of the Earth.
14. These waves travel the fastest out from an earthquake focus.
15. The place within the Earth where the earthquake starts.
17. A type of evidence for continental drift that compares rock types on different continents.
19. A type of volcano that is low to the ground.
21. Type of evidence for continental drift based on fossils of plants and animals.
22. A fold that resembles a flexed arm.
25. A type of mountain that is made from a combination of different processes.