Across
- 4. moving back or away
- 7. unprotected from something
- 10. easy to get
- 12. layer of gases around the Earth
Down
- 1. the amount that something changes
- 2. able to deal with or handle
- 3. easy to see a change
- 5. happens slowly
- 6. rotting
- 8. solid, steady, and doesn't change much
- 9. infected or polluted
- 11. has a strong effect