| A | B |
|---|
| Population | Includes all individuals of a single species in a specific area |
| Community | All populations of different organisms in a specific area |
| Ecosystem | The community and its physical environment |
| Abiotic Factors | Non-living factors that affect other living organisms |
| Biotic Factors | Living organisms in an environment |
| Producer | Anything that makes its own food from the sun |
| Consumer | Organisms that must ingest other organisms to gain its energy-another word for heterotroph |
| Decomposer | They break down the remains of dead plants and animals, releasing substances that can be reused by other organisms |
| Food Chain | A chain of organisms that starts at a producer and flows to successive consumers |
| Multicellular | Anything that requires two or more cells to function |
| Unicellular | A one celled organism that cannot grow to more than one cell |
| Motile | Capability of moving on its own |
| Sessile | The inability to move- i.e. A mushroom attached to the ground |
| Energy Pyramid | A diagram which shows the amount of available energy at each trophic level |
| Trophic Level | Level at which an organism feeds-- Producer, primary consumer, etc. |
| Scavenger | An organism which eats other organisms which have already been killed by another organism |
| Omnivore | Eats both producers and consumers |
| Carnivore | Eats only other consumers |
| Herbivore | Eats only producers |
| Primary Consumer | Eats producers |
| Secondary Consumer | Eats primary consumers |
| Teritary Consumer | Eats secondary consumers |
| Quaternary Consumer | Eats tertiary consumers |
| Species | Organisms which can mate and produce fertile offspring |
| Heterotroph | An organism who must gain energy by taking it from others- another word for consumer |
| autotroph | an organism that can produce its own food -another word for producer |
