Across
- 1. All of the living things in a specific area
- 4. The movement from one habitat to another, seasonal
- 5. A species that is likely to become endangered
- 6. Period of below average rainfall
- 11. Populations that live together
- 12. A species is one that threatens the environment and is nonnative
- 14. President that made Earth day
- 16. The Mechanism for evolution
- 17. A home to specific organisms
- 18. The variety of living things
Down
- 2. A species that no longer exists
- 3. Amphibian
- 7. The process of assisting the recovery of an ecosystem
- 8. Law to regulate air emissions
- 9. A group of cardinals
- 10. A species that is facing extinction
- 13. Native to an area
- 15. Cute marine or freshwater mammal