| A | B |
|---|
| WATER QUALITY | The degree of purity of water, determined by measuring the substances in water, besides water molecules. |
| pH | How acidic or basic a substance is, measured on a scale of 1 (very acidic) to 14 (very basic). |
| HARDNESS | The level of the minerals calcium and magnesium in water. |
| CONCENTRATION | The amount of one substance in a certain volume of another substance. |
| FILTRATION | The process of passing water through a series of screens that allow the water through, but not larger solid particles. |
| SEWAGE | Water containing human waste. |
| DROUGHT | A water shortage caused by long periods of low precipitation in a particular area. |
| CONSERVATION | The process of using a resource wisely so it will not be used up. |
| DESALINATION | The process of obtaining fresh water from salt water by removing the salt. |
| WATER POLLUTION | The addition of any substance that has a negative effect on water or the living things that depend on the water. |
| POINT SOURCE | A specific source of pollution that can be identified, such as a pipe. |
| NONPOINT SOURCE | A wide spread source of pollution, such as road runoff, that is difficult to link to a specific point of origin. |
| ACID RAIN | Rain that is more acidic than normal, caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air. |
| PESTICIDE | A chemical intended to kill insects and other organisms that damage crops. |
| KINETIC ENERGY | The form of energy an object has because of its motion. |
| POTENTIAL ENERGY | Energy that is stored and available to be used later. |
