| A | B |
|---|
| Gulf of Mexico | where Southwest Virginia's water flows to |
| tributary | smaller stream or river that flows into a bigger river or body of water |
| estuary | where fresh and salt water mix |
| abiotic factors | nonliving things that affect an ecosystem |
| divide | separates one watershed from another |
| Chesapeake bay | largest watershed in the U.S. |
| watershed | the land that water flows across or through on its way to a stream, river, or another body of water |
| macroinvertebrates, temperature, dissolved oxygen | examples of water quality monitoring |
