| A | B |
| community | the living things in an ecosystem |
| ecosystem | all the living and nonliving things in an environment, and all their interactions |
| habitat | the home of an organism |
| population | all the members of a single type of organism living in a certain area |
| abiotic | non-living parts of the environment |
| biotic | living parts of the environment |
| abiotic examples | water, temperature, soil, sunlight, air |
| biotic examples | plants, animals, and fungi |
| organism | an individual animal, plant, or single-celled life form; carries out five basic life functions |
| classifying | putting things into groups based on what they have in common |
| cause | reason something happens |
| effect | what happens |
| environment | everything that makes up an area, such as land, water, and air |
| area | a piece of water or ground |