| A | B |
|---|
| Ground water | Water beneath the ground. |
| Point source pollution | Source of contamination. |
| Plume | Contaminants seeping underground from concentrated masses. |
| Distribution system | Network of pipes that deliver water to our homes. |
| Surface water | Water on the earth's surface. |
| Water Treatment Plant | Facility that removes impurities from water berfore entering the distribution system. |
| Wastewater | Water that has been used. |
| Leaching system | A buried network of pipes with holes through which water passes. |
| Wastewater Treatment Plant | Facility where wastewater is cleaned by mechanical, and chemical processes and discharged into ground or surface water. |
| Acid rain | Precipitation that contains large amounts of acid. |
| Solution | A mixture made by dissolving a substance in a liquid. |
| pH | The unit of measure for determining whether a solution is acidic, a basic, or neutral. |
| pH scale | Used to measure pH. |
| Acid | Has a pH less than 7 (ex. vinegar or rain water). |
| Base | Has a pH greater than 7 (ex. milk of magnesia and eggs). |
| Neutral | Has a pH of 7 and is neither an acid or a base (ex. pure water). |
| Dirty fallout | Air pollutants dropped by winds. |
| Prevailing winds | Blow from one direction. |
| Dry deposits | Air pollutants that fall to the ground quickly without combining with moisture. |
| Wet deposits | Pollutants that mix with moisture in the air to form acids before falling. |
