Bibliograpy

Hardness || Testing Hardness || Classroom Data || Testing Rivers ||

Hardness Chart || Glossary || Bibliography || Quiz || About Us || Water Quality

This is where we got all of our information from:

Thanks for letting us use your websites!!

"Hard water." Hardness. 11 Jan 08. Wikipedia. 18 Jan 2008 <http://en.wikipedia.org/wiki/hard_water>

"EXPLANATION OF HARDNESS." USGS. 28-Sep-2007. U.S. Geological Survey. 18 Jan 2008 <http://water.usgs.gov/owq/Explanation.html>.

"Water Hardness." Water Hardness. 29 October 1998. 18 Jan 2008 <http://www.thekrib.com/Plants/CO2/hardness-larryfrank.html>.

"Parts Per Million (PPM)." Parts Per Million (PPM). 3 March 1997. 18 Jan 2008 <http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Ppm.html>.

Last date edited Febuary 19th, 2008

Chimacum Middle School

By:Madison M. & Nathan P.