| Term | Definition |
| Meteoric Water | Water that returns to the ocean |
| Groundwater | Water that soaks into the soil |
| nitrate | a naturally occurring compound that is formed in the soil. |
| atrazine | registered to control a wide variety of annual broadleaf weed. |
| Pesticides | kill bugs |
| Bromacil | an herbicide used for brush control on non-cropland areas |
| DBCP | is a dense yellow organic liquid with a pungent odor. |
| Suface water | water that does not soak in |
| Reservoir | object that store water in nature |
| Percolation | downward movement of water through soil |
| Condensation | change from a vapor to a liquid |
| Freezing | iquid liquid change to a solid |
| Melting | solid changes to a liquid |
| Sublimation | change from a solid to a gas(vapor) |
| Evaporation | change from a liquid to a gas(vapor) |
| Dibromochloropropane | Dense yellow organic liquid |
| Ethylene dibromide | (EDB) Mainly a man-made chemical that was used as a pesticide and a gasoline additive |
| Latent heat of melting | To change the solid form of a substance in to its liquid form at the same temperature |
| Evapotranspiration | Combination of evaporation and transpiration that occurs in plants |
| Permeability | Amount of sand, clay, or slit, organic material, and compaction of the soil |