| A | B |
|---|
| location of most of earth freshwater | icebergs |
| kill bacteria | with chlorine |
| runoff from a feedlot | nonpoint source pollution |
| parasitic worms | pathogens |
| inexpensive solution to providing more fresh water | water conservation |
| eutrophication | increase in the amount of phosphates causes this |
| thermal pollution | decreases amount of oxygen |
| potable | safe to drink |
| phosphates | fertilizers, human waste, detergents |
| water found in lakes, rivers and streams | surface water |
| watershed | large area of land drained by a river |
| reservoir | artificial lake behind a dam |
| aquifer | underground rock formation that holds water |
| desalination | process to remove salt from water |
| artificial eutrophication | increase of nutrients in a lake due to human activity |
| water cycle | continuous movement of water between earth and its atmo |
| porosity | amount of space between particles |
| well | hole dug to reach groundwater |
| irrigation | method to provide plants with water other than precip. |
| dam | structure built across a river |
| calcium and magnesium | cause hard water |
| condensation | change of water vapor into a liquid |
| precipitation | rain, hail, sleet or snow |
| evaporation | change of liquid water into a gas |
| sludge | stuff left over after filtering water |
