Ecology Crossword

2. An organism that will eat almost anything
4. Small, drifting animals that have to consume other organisms and phytoplankton
6. Chemical substances used to control or eliminate pests
12. An element found in all life on earth; ______ cycle
13. Living factors in an ecosystem
14. An organism-0-= capable of producing their own food
15. A unit of energy used to measure energy flow
18. A factor in an ecosystem that controls the growth, abundance, or distribution of a population; two words
20. The interaction between organisms or species striving for the same resources

1. An organism that obtains energy by consuming other organisms
3. Materials derived from living organisms; two words
5. Microscopic photosynthetic plants that drift in water; primary producer in many aquatic food webs
7. An organism with a specific diet
8. An organism that creates its own energy
9. The scientific study of interaction of organisms and their ecosystems
10. The role of an organism in its ecosystem
11. Nonliving factors in an ecosystem
16. The variety of life forms within an ecosystem
17. The specific area where an organism lives
19. The hierarchical levels in a food web representing the transfer of energy through species