| A | B |
|---|
| biotic factor | any living part of the environment |
| abiotic factor | any nonliving part of the environment |
| autotrophs | organisms that can build organic molecules |
| heterotrophs | organisms that cannot build organic molecules |
| producers | occupy the first trophic level |
| consumer | an organism that relies on another organism for food |
| carnivore | a consumer that eats only meat |
| herbivore | a consumer that eats only plant material |
| omnivore | a consumer that eats both plant and animal material |
| scavenger | a consumer that eats dead animals |
| detritivore | a consumer that eats decaying plant and animal remains |
| food chain | one pathway of energy transfers |
| food web | a network of multiple energy transfers |
| ten percent | the amount of energy that transfers up to the next trophic level |
| biomass | the amount of grams of organic matter per unit area |
