Nature of Ecosystems

2. complicated relationships that exist in natural ecosystems
3. along with bacteria, it shows the food for larger decomposers
4. feed on dead organic material in soil
7. describes the continuous movement of water on and below the earths surface
8. feed on other animals
9. when producers absorb solar energy
10. through which chemicals move along food chains, perhaps never entering an exchange pool
11. sedimentary cycle that consists of the movement of phosphorus from rocks to soil & sea
13. with every transformation some energy is degraded
17. make their own food
18. producers take in inorganic nutrients from the environment
20. feed on other organisms
21. a source normally unavailable to producers such as fossilized remains, rocks, and deep-sea sediments
22. a community along with its physical and chemical environment.

1. feed on solely plants or algae
2. energy cannot be created or destroyed
5. exemplified by the phosphorus cycle
6. exemplified by the carbon and nitrogen cycles
12. both land and aquatic organisms exchange carbon dioxide with the atmosphere
14. feed on plants and animals:example. Humans
15. a source from which organisms do normally take chemicals, such as the atmosphere
16. describes the continuous movement of nitrogen from atmosphere to the ground & sea
19. shows the aboveground plant material