Across
- 3. organisms and between
- 4. ecosystem
- 6. a group of
- 7. that influence
- 8. that live in
- 10. non-living
- 11. the combined
- 13. and live in
- 16. live together
- 17. life
- 18. same climate
- 19. exist, including land, water and
- 20. study of interactions
- 21. organisms
Down
- 1. and the environment.
- 2. populations
- 5. of the planet in which all of
- 9. that have
- 12. life
- 14. of all
- 15. area