| A | B |
| community | All the populations that live together. |
| populations | One type of species. |
| swamp | area of standing fresh water and water-logged soil covered by trees and bushes. |
| marsh | Standing fresh water and water-logged soil covered by grasses and cattails. |
| pond | Shallow boides of standing fresh water. |
| stream | created by water flowing on the Earth's surface. |
| river | streams join together and create one large body of moving water. |
| 2 water related environments | fresh water and salt water |