| A | B |
|---|
| environment | the surroundings in which an organism lives, which provide the specific things an organism needs |
| biotic | relating to the living parts of the environment |
| abiotic | relating to the nonliving parts of the environment |
| habitat | the part of the environment in which an organism lives |
| population | organisms of the same species living together in the same environment |
| community | the populations living in the same environment at the same time |
| ecosystem | a community and the abiotic parts of its environment |
| niche | the role of an organism in an ecosystem |
| evaporation | the change of water from liquid water to water vapor |
| water cycle | the movement of water through Earth's ecosystems |
| transpiration | the process by which plants lose water in the air |
| condensation | the process by which water vapor changes from a gas to a liquid |
| precipitation | the liquid water that returns to Earth's surface, usually as rain or snow |
| groundwater | water that soaks in the ground |
| carbon dioxide-oxygen cycle | the flow of carbon dioxide and oxygen through Earth's ecosystem |
| nitrogen cycle | the movement of nitrogen through ecosystems |
| reusable resourses | resources that can be used again & again |
| renewable resources | resources that can be replaced within a human life span |
| nonrenewable resources | resources that cannot be replaced within a human lifespan |
