| A | B |
|---|
| environment | surroundings |
| ecosystem | living and non-living things which interact in a certain place |
| population | living things of the same kind living in the same place at the same time |
| community | all of the populations that live together in the same place |
| grassland | ecosystem on land covered by grasses and flowering plants, but few trees |
| desert | ecosystem that gets very little rain |
| tundra | ecosystem on land that is cold and dry |
| coniferous forest | evergreen forest ecosystem found in cold weather areas containing mostly coniferous trees and the animals that live in or off of them |
| deciduous forest | forest ecosystem found in warm weather areas containing deciduous plants and animals that live in and off of them |
| tropical forest | rain forest ecosystem found near the equator |
| freshwater ecosystem | low-lying wetlands including rivers, lakes, ponds, and streams |
| saltwater ecosystem | the plants and animals that inhabit the oceans |
| mixed-water ecosystem | the plants and animals found where the freshwater from rivers flow into the salty sea |
