| A | B |
|---|
| chemical tests | tests water at a specific moment in time |
| biological tests | tests water over a long period of time |
| chlorine | used by humans to kill bacteria in water |
| bioindicators | animals and plants that are sensitive to changes in their environment |
| detective | what you are right now in science class |
| pH scale | determines whether a solution is an acid or a base |
| daphnia | microscopic animals that are bioindicators |
| acid rain | precipitation that is more acidic than normal |
| nitric acid rain | caused by nitrogen oxides in the air, mostly from cars and trucks |
| sulfuric acid rain | acid rain caused mostly from coal burning power plants that make electricity |
| acid | substance with a pH of 0 to 6 |
| base | subtance with a pH of 8 to 14 |
| neutral | substance with a pH of 7 |
| erosion | wearing away of sediment |
| sediment | tiny particles of rock, dirt, and sand |
