Ecosystem

2. organisms that make their own food
5. the number of steps it is from the start of the chain
9. organisms that obtain energy by the oxidation of reduced compounds
10. renewable organic material that comes from plants and animals
13. microscopic organisms that live in watery environments, both salty and fresh
15. an organism that mostly feeds on plants.
17. a model that shows the flow of energy
18. an organism that cannot produce its own food and must eat other plants and/or animals to get energy
19. of or relating to life
20. a biological community of interacting organisms and their physical environment

1. those that predate upon primary consumers
3. organisms that consume dead and decaying organic matter
4. organism that breaks down dead organic material
6. the ability to do work
7. an organism that regularly consumes a variety of material, including plants, animals, algae, and fungi
8. Not associated with or derived from living organisms.
11. the ratio between the output of production and the input of production factors/means
12. an organism that can produce its own food using light, water, carbon dioxide, or other chemicals
14. an organism that mostly eats meat, or the flesh of animals
16. an organism that eats other plants or animals for energy and nutrients