| A | B |
|---|
| Evaporation | Water that is lifted as vapor into the atmosphere |
| Condensation | Rapid cooling of water; creates clouds |
| Precipitation | Falling of water to earth in different forms |
| Runoff | Unabsorbed water that washes away from soil surface |
| Percolation | Penetration of soil surface by water |
| Groundwater | Water that is held underground |
| Surface water | Water held on the soil surface |
| Topography | Shape of the land and landforms |
| D.O. | Amount of oxygen within the water |
| T.D.S. | Amount of minerals and metals within the water |
| Point source pollution | Pollutant comes from a known source |
| Non-point source pollution | Pollutant comes from many sources or unknown sources |
| Clarity | Clearness |
| Conductivity | Ability to carry an electrical current |
| Contaminant | Undesirable substance |
| Turbidity | Measures level of cloudiness in water |
| Water cycle | Movement of water in nature |
| pH | Level of acidity in water |
| Acid | pH level below 7.0 |
| Base | pH level above 7.0 |
