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Across 4. An organism that eats dead organisms or other organic material (eg. feces) 5. A collection of different species populations within a given area 8. An organizational tool that describes a linear relationship between trophic levels 13. An organism that eats secondary consumers 15. An complex organizational tool that includes many food chains 18. An organism that digests organic material on a microscopic level (eg. bacteria, mushrooms) 19. An organism that feeds only upon plants 20. Where an animal lives 21. An organism that feeds off of another, yet does not kill it

Down 1. An organism that eats primary consumers 2. An organism that feeds upon producers 3. An organism capable of using energy from the sun to grow 6. An organism that eats a little of everything/anything (eg. black bear) 7. An organism that feeds only upon flesh 9. The total number of one species in an area 10. An organism that must eat another organism for energy 11. An organism capable of photosynthesis 12. An organism at the 'top' of the food chain/web 14. An organism that consumes large amounts of dead organisms (think 'big bites') 16. The interactions between all biotic and abiotic factors in an area 17. The sum total weight/mass of a particular species, population, community, or ecosystem