| A | B |
| producer | uses sunlight to make their own food during photosynthesis |
| consumer | can not make their own food |
| carnivore | eats other animals |
| herbivore | eats only plants |
| omnivore | eats plants and animals |
| scavenger | feeds on the remains of dead organisms |
| decomposers | returns the nutrients of decaying organisms back to the Earth |
| food chain | shows how energy flows from one organism to another |
| food web | shows all of the possible energy connections between all of the organisms in an ecosystem |
| biotic | living |
| abiotic | not living |
| organism | one living thing |
| population | a group of all the same species |
| community | all of the different species |
| ecosystem | all biotic and abiotic factors in an area |
| biosphere | the part of Earth where life exists |
| mutualism | a relationship where both organisms benefit |
| parasitism | a relationship where one organism benefits, but the other is harmed |
| commensalism | a relationship where one organism benefits and the other is not affected at all |
| symbiosis | a close relationship between two organisms, can be good or bad |