Across
- 2. the percentage of energy entering an ecosystem
- 4. process by which food is made by bacteria in the absence of sunlight
- 10. made of material that comes from living organisms
- 11. organisms that break down dead or decaying organisms
- 13. consumers at the top of the pyramid
- 16. the process that converts nitrate to nitrogen gas
- 17. a living part of an ecosystem
- 18. the base of several aquatic food webs
- 19. organisms that make their own food
- 20. only eats animals
Down
- 1. eat only plants
- 3. an organism that makes its own food
- 5. a group of living organisms that live in a specific environment
- 6. animals that feed off of dead organic material
- 7. the beginning of ecological succession
- 8. process by which microorganisms present in soil, sediment, or water
- 9. a non living part of an ecosystem
- 12. comes in many forms including snow, rain, sleet, hail
- 14. organisms that eat primary consumers
- 15. consumers that are herbivores, feeding on plants