Across
- 2. not easily replaced
- 7. opposing view is catastrophism
- 9. study of Earth
- 10. the idea of an ancient earth
- 11. marks bottom of crust
- 12. raw material used from environment
Down
- 1. to control use of natural resources
- 3. have an unlimited supply
- 4. area of upper mantle and crust
- 5. outer layer of the Earth
- 6. the center of the earth
- 8. moho to 1800 miles below surface