| A | B |
|---|
| waterquality | the degree of purity of water |
| pH | how acidic or basic a substance is |
| hardness | how much calcium and magnesium is found in water |
| concentration | the amount of one substance in a certain volume of another substance |
| filtration | passing water through a series of screens that allow the water through, but not larger solid particles |
| flocs | sticky globs created by adding a chemical such as alum during water treatment |
| coagulation | the process by which particles in a liquid clump together |
| sewage | water containing human waste |
| sludge | deposits of fine solids that settle out from wastewater during the treatment process |
| septictank | an underground tank containing bacteria that treats wastewater as it passes through |
| leachfield | the ground area around a septic tank through which wastewater filters after leaving the tank |
| drought | a water shortage |
| conservation | using a resource wisely |
| desalination | obtaining fresh water from salt water |
