| Question | Answer |
|---|---|
| tributary | a stream that flows into a larger stream |
| Watershed | The land area that supplies water to a river system |
| eutrophication | the process by which nutrients in a lake build up over time causing an increase in the growth of algae |
| wetland | an area of land that is covered with a shallow layer of water during some or all of the year |
| Water quality | The degree of purity of water determined by measuring the substance in the water besides water molecules |
| water pollution | The addition of any substance that has a negative effect on water or the living things that depend on water |
| Point source | a specific source of pollution that can be identified such as a pipe |
| nonpoint source | a widely spread source of pollution such as road runoff that is difficult to link to a specific point of origin |
| Pesticide | A chemical intended to kill insects and other organisms that damage crop |
| Estuary | A coastal inlet or bay where fresh water mixes with salty ocean water |
| Sediment | Small solid particles of material from rock or organisms which are moved by water or wind resulting in erosion and deposition |
| conservation | The process using a resource wisely so it will not be used up |
| recycling | The process of reclaiming and reusing raw material |
