Across
- 1. breaking down by mechanical means
- 5. landslides/mudslides/rivers/waterfalls
- 7. animals
- 9. carbonic acid/creates caves
- 11. rocks breaking into smaller pieces
- 12. rusting
Down
- 2. lichen/moss
- 3. acid rain
- 4. uplift/conv. cont. cont.
- 6. animals burrowing or digging
- 8. frost
- 10. plant roots