Plate Tectonics
Across
- 4. What evidence led him to believe the continents may have fit together
- 5. Place where two plates are moving apart is called a _____ boundary
- 7. Islands form when a plate moves over a stationary what in the mantle
- 11. Instrument used to detect vibrations in the Earth
- 12. The strain when two plates are pushing together
- 13. Layer below the crust that is mostly solid but can move like silly putty due to great heat and pressure
- 14. Deep underwater depression
- 17. The man who discovered the continents may have fit together
- 19. Underwater volcanic mountain chains
- 23. Liquid part of the center (Second layer from center)
- 25. The strain when two plates are pulling apart
- 26. Two plates pulling apart can create what
- 28. The outermost layer of the Earth (You walk on it!)
Down
- 1. The point directly above the focus during an earthquake
- 2. Center of the Earth made of metals like iron and nickel
- 3. Layer below the crust that is cooler and more brittle (Upper portion of the Mantle)
- 6. Under the ocean, the process when plates diverge and new crust is formed is called
- 8. Name for the supercontinent
- 9. California has many earthquakes because it sits on a
- 10. Seismic waves are measured using which scale
- 15. The process where heat rises from the bottom, spreads and then cools
- 16. The structure that is created when the plates move and release pressure from within the Earth
- 18. What happens when two plates slide and grind past each other
- 20. Place where two plates are moving together is called a ____ boundary.
- 21. Waves of energy that travel through the ground
- 22. Two plates colliding can create what
- 24. The point that the earthquake originated
- 26. An earthquake in the ocean can cause this
- 27. The strain when plates are moving sideways