Across
- 4. arer
- 8. feff
- 9. erag
- 11. xdfvdf
- 12. fvsvsdf
Down
- 1. an unwanted change in the environment caused by substances or forms of energy
- 2. aeggee
- 3. dsfdsfgf
- 5. decribes a species that has died out completely
- 6. aggrg
- 7. the place where an organisim usually lives
- 10. errgae