Plate Tectonics
Across
- 4. Person who studies rocks
- 6. Period of time
- 8. Largest unit of geological time
- 10. In reference to the oceans
- 13. Very old
- 14. Solid substance that occurs naturally
- 16. Region of the Earth where organisms exist
- 18. Earth's outer crust
- 19. The process of covering the Earth's surface with ice
Down
- 1. One of earth's large landmasses
- 2. Sudden volcanic discharge
- 3. Caused by earthquakes or volcanic activity
- 5. Molten lava on the Earth's crust
- 7. Phenomena associated with volcanic activity
- 9. Crash together with violent impact
- 11. Not flexible, unable to bend
- 12. To reduce to a liquid state
- 15. Relates to the movement of the Earth's crust
- 17. To become separated