water

2. too much of this group of substances causes algal blooms in water
5. movement of soil by water
6. buildup of harmful chemicals in the food web that are stored in the fat of animals
7. a smaller creek (like Crum Creek) that flows into a larger river (like the Delaware)
8. the measure of the amount of minerals in water
10. book written by Rachel Carson about persistent pesticides killing off bird populations
14. area that is responsible for cleaning and filtering polluted water naturally
15. term for the area where freshwater rivers mix with saltwater bays
16. "cloudiness" of water. measurement of the amount of sediment/particles in water

1. created by pesticide resistance being passed from generation to generation
3. runoff from streets, farms, lawns and cities is this type of water pollution
4. first order streams at the start of a watershed
9. term for the boundary between watersheds
11. measurement of how basic or acidic a liquid is
12. of Mexico where the largest "Dead Zone" in the US can be found due to excess nutrients in the Mississippi River from farms
13. a pipe dumping waste into a river is an example of this type of water pollution
14. geographic area that rains into the same body of water(ex. Delaware River)