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Dr. Ronald P. Rogers CHIROPRACTOR Support for your body's natural healing capabilities 270-384-5554 Click here for details 
  
Columbia Gas Dept. GAS LEAK or GAS SMELL Contact Numbers 24 hrs/ 365 days 270-384-2006 or 9-1-1 Call before you dig 
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CHS students perform penny experiment Tests prove which coins are pure copper, which are alloyed with zinc coating Click on headline for story with photo(s) By Calen McKinney, Public Information Officer Campbellsville Independent Schools Campbellsville High School chemistry students recently performed an experiment with pennies. CHS teacher Dee Doss asked students to determine whether their pennies were made of pure copper. Students were given two pennies, one made before 1982 and the other made after 1982. First, students created grooves in the pennies. Then, they placed the pennies in a beaker and soaked them in hydrochloric acid. They observed any reactions happening and then let their pennies sit overnight. In the end, based on the condition of their pennies, students learned that before 1982, pennies were made of pure copper. Afterward, pennies were made of copper with a zinc coating. - Calen McKinney This story was posted on 2017-03-14 05:18:21
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