| A | B |
|---|
| ecosystem | living and nonliving things that interact in an area |
| habitat | where an organism lives |
| biotic factors | living parts of an ecosystem |
| abiotic factors | nonliving parts of an ecosystem |
| species | a group of similar organisms |
| population | all members of one species |
| community | all the different populations that live together |
| ecology | study of how things interact |
