| A | B |
|---|
| abiotic factor | nonliving components of the environment |
| biotic factor | living components of the environment |
| habitat | a place where an organism lives |
| niche | the role an organism plays in its environment |
| resource | anything that is needed by living things |
| predation | an interaction in which one organism feeds on another |
| symbiosis | two organisms living in close association with each other |
| mutualism | a relationship in which both organisms benefit |
| parasitism | a relationship in which one organism benefits and another is harmed |
| commensalism | a relationship in which one organism benefits and another is not affected |
| ecological succession | the natural progression of different types of organisms that live in a given area over time |
| primary succession | succession that starts where no soil exists to begin with |
| pioneer species | the first organisms to populate an area |
| secondary succession | succession that starts from an area that already has soil |
| weather | the day to day condition of the atmosphere |
| climate | the average, year-round conditions of temperature and precipitation |
