| A | B |
|---|
| estuary | An area where the fresh water of a river mixes with the salt water of an ocean. |
| river system | A river and its tributaries. |
| tributary | A stream or river that flows into a larger stream or river. |
| canal | A human-made waterway that is dug across land to connect two bodies of water. |
| aquifer | A layer of rock that holds water. |
| groundwater | Water beneath EarthÕs surface. |
| sinkhole | A bowl-shaped hole in the surface of the land formed when water dissolves part of the limestone layer. |
| bay | A body of ocean water or seawater that is partly enclosed by land. |
| harbor | A part of a body of water where a ship can dock safely. |
| inlet | A narrow water passageway leading into the land from a larger body of water. |
