Across
- 2. one plate slides under another plate
- 3. the outermost layer of Earth
- 6. two plates move apart from each other
- 7. dropped zone where two tectonic plates are pulling apart
- 8. any instrument used for measuring and recording the vibrations of earthquakes
- 10. seismic waves that move in a back and forth/push-pull motion
- 14. supercontinent from 225 years ago, made up of all continents
- 15. the thick shell of dense, rocky matter that surrounds Earth's core
- 16. seismic waves that move in a side-to-side motion
- 17. the point on Earth's surface vertically above the focus of an earthquake
- 18. the border between two tectonic plates
- 19. a slow flowing layer of solid and melted rock formed by heat and pressure
- 20. a huge ocean wave caused by a sudden shift on the ocean floor
Down
- 1. the point of origin of an earthquake
- 4. two plates slide past each other
- 5. A 1-10 scale that indicates the intensity of an earthquake
- 9. melted rock under the surface of Earth
- 11. theory that explains the causes of global seismic and volcanic activity
- 12. melted rock on the surface of Earth
- 13. shaking of Earth's surface due to a release of energy in the crust