Aquatic Science Ch. 3

5. The biggest pollutant is plain old dirt, also called _______.
8. A stream that flows into a larger stream or other body of water.
12. A region based upon physical geography and natural features of terrain and habitats.
14. Land drained by a river.
15. An area that includes parts of coastal plains, peninsulas, and islands that lie adjacent to and between the main river basins.
16. An area of land where water accumulates.
17. The high ground where precipitation first collects and flows downhill in tiny trickles.
19. A stream that flows, dries up, and flows again at different times of the year.
20. The wearing away of land surface materials, especially rocks.

1. This lake is named after a city in the Brazos Valley.
2. Any bit of rock or soil, such as mud, clay, silt, or sand.
3. The watershed, sub-watershed, and sub-sub-watershed that includes a particular location.
4. A type of solution which comes from a combination of many sources rather than a single outlet.
6. A river named after the Brazos Valley.
7. The contamination of air, water, or soil.
9. A stream that has flowing water in it all year long.
10. The bottom of a stream.
11. A type of stream that flows part of the year.
13. Water pollution that comes from a single source or outlet.
18. A river named after a city in the Brazos Valley that intersects with the Brazos River.