| A | B |
|---|
| abiotic | nonliving parts of the environment |
| biotic | living parts of the environment |
| community | populations living in the same environment at the same time |
| ecosystem | a community and its abiotic parts |
| environment | all the biotic and abiotic surroundings of an organism |
| habitat | part of the environment in which an organism lives |
| niche | role of an organism in an ecosystem |
| population | many of the same species living together in the same place |
| land, air, water, climate | abiotic items |
| plants and animals | biotic items |
