| A | B |
|---|
| wetland | low land that is often covered by water |
| population | all the living things of the same kind that live in the same place at the same time |
| environment | everything that surrounds a living thing |
| tundra | the ecosystem that is the coldest and farthest north |
| ecosystem | all the living and nonliving things that interact in an area |
| grassland | an ecosystem with many grasses and few trees |
| desert | an ecosystem with hot, dry days and little rain |
| community | formed by all the populations living in the same place |
