| A | B |
|---|
| water quality | the degreee of purity of water moves through the living and the nonliving parts of the environment (p.32) |
| concentration | the amount of one substance in a certain volume of another substance (p.84) |
| coagulation | the rocess by which particles in a liquid clump together; a step in the water treatment process )p.85) |
| septic tank | an underground tank containing bacteria that treat wastewater as it passes through (p.89) |
| pH | how acidic or basic a substance is, measured on a scale of 1 (very acidic) to 14 (very basic or alkaline) (p.83) |
| filtration | the process of passing water through a series of screens that allow the water through, but not the larger solid particles (p.85) |
| sewage | water containing human wastes (p.87) |
| leach field | the ground area around a septic tank through which wastewater filters after leaving the tank (p.89) |
| hardness | the level of the minerals calcium and magnesium in water (p.84) |
| flocs | sticky globs created by adding a chemical such as alum during water treatment (p.85) |
| sludge | deposits of fine solids that settle out from wastewater during the treatment process (p.88) |
| drought | a water shortage caused by scarce rainfall in a particular area (p.91) |
| conservation | the process of using a resource wisely so it will not be used up (p.92) |
| desalination | the process of obtaining fresh water from salt water by removing the salt (p.94) |
| water pollution | the addition of any substance that has a negative effect on water or the living things that depend on the water (p.97) |
| nonpoint source | a widely spread source of pollution that is difficult to link to a specific point of origin, such as road runoff (p.99) |
| pesticide | a chemical intended to kill insects and other organisms that damage crops (p.102) |
| point source | a specific source of pollution that can be identified, such as a pipe (p.99) |
| acid rain | rain that is more acidic that normal, caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air (p.101) |
| kinetic energy | the form of energy that an object has when it is moving (p.106) |
| potetial energy | energy that is stored and waiting to be used (p.106) |
| hydroelectric power | electricityproduced by the kinetic energy of water moving over a waterfall or dam (p.106) |
