Across
- 5. the age of rock compared to other rocks
- 9. studies of earth
- 12. same processes occurring throughout history
- 16. made of less dense materials
- 18. formed from pre-existing rocks
- 19. giant cloud in space
- 20. age of rock in years
Down
- 1. web of process of how rocks form
- 2. broken rock formation
- 3. formed from high heat and pressure
- 4. weak force
- 6. made of dense materials
- 7. An opening in the ground
- 8. study of rock layers
- 10. ability to do work
- 11. formed from dead plant material
- 13. form when hot molten rock crystallizes
- 14. Naturally occurring
- 15. created from minerals slowly cooling magma
- 17. unit of force