Jewelry cleaning machines are great at cleaning coins.....
.....but there are many rules for not mixing metals and which cleaners should be used with which coins.
My son used the scientific method to discover some of these rules.
Ask a question
Research the answer
Construct a hypothesis
Test hypothesis by doing an experiment
Analyze data and draw conclusions
Ask a question - Will the jewelry cleaning machine work on pennies, nickels, dimes and quarters?
Research the answer - Members of the local metal detecting club said they have used jewelry cleaning machines to clean coins with great success.
Construct a hypothesis - It will work on pennies, nickels, dimes and quarters.
Communicate the results - He was excited to tell me that the dimes and quarters became much cleaner, but the pennies and nickles didn't change much.
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