Across
- 3. gas released from photosynthesis
- 4. a increase of phosphates and nitrates
- 6. energy needed for photosynthesis
- 9. all life on earth
- 10. observavtion,fact,calculation
- 11. a group of ecosystems under a climate
- 14. organisms that make their own food
- 15. competition between two species
Down
- 1. when eutrophication occurs beneath algea
- 2. cellular respiration liquid waste
- 5. glucose is a example of
- 7. organisms that eat others
- 8. social, enviromental, economic
- 12. a impact of a person
- 13. cellular respiration gas waste