Across
- 6. nutrients
- 8. waste
- 10. filtering of fluids
- 11. soil horizons form
- 12. Whole soil
- 13. transparent
- 15. chemical element
Down
- 1. hot or cold
- 2. organisms
- 3. odorless
- 4. layer of earth
- 5. maintain water for life
- 7. liquids or gas
- 9. permeation
- 14. long exposure