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Data Sheet for "A Penny Saved is a Penny Heard".

Collect American pennies with different dates - pennies from the 1960's, 1970's, 1980's and 1990's are fine. Drop each penny one-by-one and note how it sounds. If the penny sounds "dull" and "tinny", then it is probably new. If the penny "rings" and has a more "full" sound, it is probably old. Print out this page and use the chart to record your observations. Put a "N" below the dates of pennies that sound new. Put an "O" below the dates of pennies that sound old. Do you see a pattern? When did the "old" pennies start sounding "new". Check your results with other people.

1960  1961  1962  1963  1964  1965  1966  1967  1968  1969  

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1970  1971  1972  1973  1974  1975  1976  1977  1978  1979

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1980  1981  1982  1983  1984  1985  1986  1987  1988  1989  

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1990  1991  1992  1993  1994  1995  1996  1997   

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