1. Purity - Freedom from adulteration and contamination
2. Clean water - water that is suitable for hand washing
3. Filtrate - Liquid collected after it has been filtered
4. Adsorbs - attracts and holds on its surface
5. Percent recovery - percent of your original substance found in your sample
6. Histogram - a graph obtained by graphing the range and data set into equal intervals and plotting the number of data points in each interval.
7.Average - adding all values together and dividing the sum by total number of values
8. Mean value - average
9. Median - middle value
10. Electrical conductivity - electrically charged particles in water
11. Tyndall effect - shows that there are particles in water which allows you to see the light beam going through water ( which is the light bouncing off the particles in the water )
12. Hydrologic cycle - rain or snow falls in the U.S, only 10% is used by humans. The rest flows back into bodies of water, evaporates into the air, and falls again.
13. direct water use - can be directly measured
14. indirect water use - hidden uses of water you may have never considered
15. water's gaseous state - water vapor in the air
16. water's liquid state - liquid water ( oceans, rivers, etc )
17. water's solid state - ice
18. surface water - a home's water supply that came from river or another body of water
19. ground water - home's water supply that came from a well or was pumped to the surface
20. aquifer - a water - bearing layer of rock, sand, or gravel
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