Across
- 5. The elevation of the earth's surface
- 6. The thinnest layer of the earth
- 7. What is sandstone
- 9. Placing one thing on or above another
- 12. The center of the earth
- 14. The largest layer of the earth
- 16. Involving or causing sudden great damage
- 17. composition The ratio of atoms and molecules
- 19. The release of energy
- 21. Disrupting layers of rocks
- 22. chain A connected series of mountains
- 23. Came from the core
- 25. Arranging something in layers
- 26. fossil A fossil that is useful in dating time periods
- 27. tectonics What we stand on is moving
Down
- 1. Layers of rock
- 2. Being covered by glaciers or ice sheets
- 3. strata Layers of rock
- 4. Rocks formed by heat and pressure
- 5. Vertical layers of rock
- 8. The theory of changes in the earth's crust
- 10. History of life documented by fossils
- 11. The scale of time periods
- 13. A crack
- 15. fossil Things that lived 3.5 billion years ago
- 18. Crystalized rock
- 20. The degree of compactness of a substance
- 24. density A ratio of the density