Across
- 5. has a ph from 1-6
- 6. grows through rock
- 7. acidic rain
- 12. composition and appearance change
Down
- 1. they dig holes in the ground
- 2. rocks broken down into smaller pieces
- 3. ice wedging
- 4. has a ph from 8-12
- 8. chemical change that can happen to medal
- 9. the make up of something
- 10. were a ends river
- 11. acidic plant