| A | B |
|---|
| Habitat | The place where an organism lives and that provides the things the organism needs. |
| Ecosystem | All living and nonliving things that interact in a particular area. |
| Biotic | The living parts of an ecosystem. (Grass, plants and any animals) |
| Abiotic | The nonliving parts of an ecosystem. (Water, sunlight, oxygen, temperature and soil) |
| Photosynthesis | The use of water, carbon dixoide and sunlight to make food |
| Species | A group of similar organisms whose members can mate with one another and produce offspring. |
| Populations | All the members of one species in a particular area. |
| Community | All the different populations that live together in an area. |
| Ecology | the study of how living things interact with one another and with their environment. |
| Population Density | the number of indivuals in a specific area |
| Estimate | An approximation of a number, based on reasonable assumptions |
| Birth rate | Number of births in a population in a certain time. |
| Death Rate | The number of deaths in a population in a certain time. |
| Immigration | Moving into a population. |
| Emigration | Leaving a population. |
| Limiting factor | An environmental factor that prevents a population from increasing. (some limiting factors for populations are food, space and weather conditions) |
| Carrying Capacity | The largest population that an environment can support. How many it can hold. |
