Across
- 2. A large body of salt water.
- 4. A group of similar living things.
- 10. When a species no longer exists.
- 12. A safe place where animals are protected.
- 13. The variety of living things in an area.
- 14. A large area covered with trees.
- 15. The number of living things in an area.
Down
- 1. A community of living things and their environment.
- 3. To keep something safe from harm.
- 5. Protecting plants, animals and the environment.
- 6. Harmful substances that damage the environment.
- 7. At risk of becoming extinct.
- 8. A large natural stream of water.
- 9. Animals and plants living in nature.
- 11. The natural home of a plant or animal.
