Across
- 3. areas that stay covered in water and have unique organisms
- 9. an area of land where water from rainfall, snow, and runoff collects
- 10. when animals move from one place to another in a regular pattern
- 11. a plant or animal that has very few of its type left
- 12. variety of life found on Earth
- 13. the study of how living things interact with their environment
- 14. a plant or animal that no longer exists on Earth
Down
- 1. preventing waste or preserving something
- 2. a community of organisms that live together in a specific environment
- 4. relating to the ocean or sea
- 5. chemicals used to kill unwanted pests such as insects
- 6. an area where humans have not disturbed the land
- 7. a chemical used to kill plants
- 8. the specific place where a plant or animal lives and has the resources it needs to survive