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Across 3. Interactions organisms in their physical environment 9. Interconnection of food chains in a graphical representation of who eats what (2 Words) 10. Leeching off of another organism in a harmful way 14. Network of links that goes from produces to apex predators (2 Words) 17. There are five types of this, Aquatic, grassland, forest, desert, and tundra 18. Any condition in environment that limit population size (2 Words) 19. Has to ingest organisms for fuel 21. Changing the way you react 23. Position an organism occupies in a food web (2 Words) 24. Process that helps scientist understand what is happening in an ecosystem (2 Words)

Down 1. A group of interacting organisms that are living 2. Can break down dead organisms for fuel 4. Competition of members of the same species 5. Living factors in an ecosystem 6. An organism that hunts and captures another organisms for energy/food 7. Where living organisms and organic matter exists 8. Using an organism in a way that only benefits you, but doesn’t harm anyone 10. Same species living together in a group in an area 11. When both organisms benifit in an interaction 12. Can convert light into energy for fuel 13. A process in which you use a large square/grid and place it in an ecosystem to collect information about the population (2 Words) 15. Competition between members of a different species 16. NonLiving factors in an ecosystem 20. Two individuals from different species having a relationship 22. The study of how living and non living factors in an ecosystem interact