ECOLOGY CROSSWORD

5. another word for an organism that eats
6. organisms burn this percentage of the food they take in
7. denotes the direction of food transfer within a food chain
8. feed off of dead organisms, returning nutrients to the soil
11. animal that eats both plants and other animals
12. all of the organisms of the same kind, living together in the same area
14. molecules produced by a chemical reaction
16. name of the sugar that plants produce
18. gas produced as a waste product during photosynthesis
19. molecules needed in order for a chemical reaction to occur
20. the number of individuals in population that the environment can comfortably sustain.
21. liquid needed by plants in order to photosynthesize
22. organisms that make their own food; another term for plants
24. one organism benefits and the other is unaffected

1. gas needed by plants in order to photosynthesize
2. animal that only eats only plants
3. all the trophic levels, in order, stacked upon each other (triangular shape)
4. the energy that keeps food webs going and going, forever and ever
9. animal that only eats other animals
10. both organisms benefit from each other
13. all the different kinds of organisms living together in an area
15. as a predator population increases, its prey population ________
17. all the different kinds of organisms living in an area, along with the nonliving components of the environment
20. green pigment located in plant cells that helps photosynthesis happen
23. one organism benefits at the expense of the other