| A | B |
|---|
| Irrigation | The process of supplying water to areas of land to make them suitable for growing crops. |
| Conservation | The practice of using less of a resource so that it will not be used up. |
| Desalination | The process of obtaining fresh water from salt water by removing the salt. |
| Water quality | The degree of purity of water, determined by measuring the substances in water besides water molecules. |
| Concentration | The amount of one substance in a certain volume of another substance. |
| pH | The measurement of how acidic or basic a substance is, on a scale of 0 (acid) to 14 (basic). |
| Hardness | The level of the minerals calcium and magnesium in water. |
| Filtration | The process of passing water through a series of screens that allow the water through but not larger solid particles. |
| Coagulation | The process by which particles in a liquid clump together. |
| Sewage | Wastewater containing human wastes. |
| Water pollution | The addition of any substance that has a negative effect on water or the living things that depend on the water. |
| Hydroelectric Power | Electricity produced by the kinetic energy of water moving over a waterfall or dam. |
| Point source | A specific source of pollution that can be identified. |
| Nonpoint source | A widely spread source of pollution that is difficult to link to a specific point of origin. |
| Pesticide | A chemical intended to kill insects and other organisms that damage crops. |
| Acid Rain | Rain or another form of precipitation that is more acidic than normal, caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air. |
| Drought | A long period of scarce rainfall. |
| Flash flood | A sudden, violent flood that occurs within a few hours, or even minutes, of a storm. |
| Levee | A long ridge formed by deposits of sediments alongside a river channel. |
| Kinetic energy | The form of energy that an object has when it is moving. |
| Potential energy | Energy that is stored and waiting to be used. |
| Pollutant | A substance that causes pollution. |
