Across
- 5. dark colored organic matter in the soil
- 6. wide vally which a river flows
- 10. traces of living things
- 11. big piece of ice
- 13. conserve soil
- 14. 9+10=
- 16. copy of organisms body
Down
- 1. wide,sloping,deposit of sediment
- 2. a large channel in soil formed by erosion
- 3. breaks down rock
- 4. rich fertile soil
- 7. breaks rock down through chemical changes
- 8. grinding away of rock by other rock
- 9. one surface moves across another surface
- 12. ability to do work
- 15. the species no longer lives