| Term | Definition |
| biome | a group of ecosystems with similar climates and organisms |
| ecosystem | all the living and non living organisms lives and that provides the things and needs |
| habitat | the place where and organism lives and that provides the things it needs |
| niche | and organism's particular role in an ecosystem or how it makes its living |
| biotic factors | a living part of an ecosystem |
| abiotic factors | a non living part of and ecosystem |
| photosyntheis | the proces in which organisms use water along with sunlight and carbon dioxide to make food |
| oranism | any living things, a plant or animal |
| species | a group of organisms that are similar and reproduce to produce fertile offspring |
| population | all members on 1 spicies in a pitcular area |
| community | all the different populations that live together in an area |
| ecology | the study of how living things interact with eachother and their enviorment |
| birth rate | the number of births in a population in a certain amout of time |
| death rate | the number of deaths in a population in a certain amount of time |
| immigration | moving into a population |
| emigration | leaving a population |
| population densyty | the number of individuals in a specific area |
| limiting factors | an enviromental factor that prevents a populatipon from increasing |
| carrying capacity | the biggest population that an area can suport |