Across
- 4. Where two tectonic plates meet
- 6. This type of rock is by sediment that is compacted and cemented
- 9. Upward movement of rock layers
- 17. The dropping of pieces of weathered rock carried by water, wind, or ice
- 18. The longest unit of time
- 19. The outer part of the Earth
- 20. The unit of time periods are broken up into
- 22. An opening in the Earth's surface through which magma is released
- 23. Melted rock that reaches the Earth's surface
- 24. A process by which weathered rock is picked up and moved to new places
- 26. The type of plates that make up sections of the lithosphere
- 27. Consists of three eons and includes much of the earth's history
- 28. Process by which rock layers are squeezed together and pushed up
Down
- 1. The permanent dying out of of a species or larger group of organisms
- 2. This law states that in undisturbed sedimentary rock layers, older layers of rock lie under younger rock layers
- 3. Melted rock beneath the Earth's surface
- 5. These are the units that eons are divided up into
- 7. This type of rock forms when existing rock is exposed to high heat, high pressure, or both
- 8. Material that is deposited
- 10. This type of fossil is of an organism that existed only for a short period of geologic time
- 11. The study of earth's history, processes, and structures
- 12. This type of rock forms when melted rock cools and hardens
- 13. Is the age of an object in comparison to another object or event
- 14. A great variety of living things appeared during this time
- 15. The preserved remains of or evidence of organisms that lived in the distant past
- 16. This breaks rock down to smaller pieces
- 20. When there are no more of individuals of those species living on Earth
- 21. A block of time during which unique rock layers were laid down
- 25. Break or crack in the Earth's surface in which spreading occurs