Across
- 2. wheat
- 3. movement divergent, convergent, and transform
- 5. the quality of being hard
- 8. record rock that currently exist
- 12. record used to study fossils
- 13. grouping something according to shared qualities or characteristics
- 15. boundary location where two plates slide past one another
- 16. a mountain with a hole in the top that sometimes sends out lava, rock, and ash
- 18. remains the remains of plants and animals from prehistoric time
- 19. surface the four layers of the earth
Down
- 1. a solid inorganic substance of natural occurrence
- 4. age actual age
- 6. action of depositing something
- 7. time the period of time covering the physical formation
- 9. qualities of an object or substance with respect to light
- 10. age close to the real age of something
- 11. properties a physical property, such as weight or temperature
- 14. plates is the theory that the earth was one
- 17. the feel of a surface