| A | B |
|---|
| ecosystem | The living and nonliving things in an environment. |
| population | A group of the same kind of living thing that all live in one place at the same time. |
| community | All the populations of organisms that live in an ecosystem. |
| habitat | The place where a population lives in an ecosystem. |
| environment | The things, both living and nonliving, that surround a living thing. |
| forest | An area in which the main plants are trees. |
| salt water | Water that has a lot of salt in it. |
| deciduous forest | A forest in which most of the trees lose and regrow their leaves each year. |
| tropical rain forest | A hot, wet forest where the trees grow very tall and their leaves stay green all year. |
| coastal forest | A thick forest with tall trees that gets a lot of rain and does not get very warm of cold. |
| coniferous forest | A forest in which most of the trees are conifers (cone-bearing) and stay green all year. |
| desert | An ecosystem where there is very little rain. |
| fresh water | Water that has very little salt in it. |
