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Science homework
Ewen 6th period class
| Question | Answer |
|---|---|
| irrigation | process of supplying water to areas to make suitable for growing crops |
| conservation | practice of using less of a resource so that it will not be used up |
| desalination | obtaining fresh water from salt water |
| water quality | measurement of the substances in water besides water molecules |
| concentration | the amount of one substance in a certain volume of another substance |
| pH | measurement of how acidic or basic the water is on a scale of 0-14 |
| hardness | combined level of two minerals- calcium and magnesium- in a sample of water |
| filtration | process of passing water through a series of screens that allows water through, but not larger solid particles |
| coagulation | the other particles that stick to the flocs |
| sewage | water containing human wastes |
| water pollution | addition of any substance that has a negative effect on water or the living thing that depend on water |
| pollutant | substances that cause water pollution |
| point source | specific source pollution that can be identified |
| non-point source | widely spread source of pollution that can't be tied to a specific point of origin |
| pesticide | chemicals intended to kill insects and other organisms that damage crops |
| acid rain | rain or another form of precipitation that is more acidic than normal |
| drought | a long period of scarce rainfall |
| flash flood | sudden and violent flood that occurs within a few hours, or even minutes, of a storm |
| levee | long ridge formed by deposits of sediments alongside a river channel |