Wk5 lab 4 density of pennies

Lab 4: Density of Pennies• Title• Objectives • To determine mass, volume and density of Pennies • Compare and contrast Densities of Pre-1982 and Post 1982 Pennies • To master use of the balance, graduated cylinder, calculating averages and the derived SI unit of Density.• Materials• Procedure • Step by Step “Movie Script”• Analysis/Data • Contains measurements and calculations• Discussion • Talks about the results and how they relate to the objectives• Conclusion • Short paragraph explaining the results of the experiment and whether the objectives were achieved.

Lab 4 Density of Pennies• Part 1• A) Measure the mass of 20 pennies older than 1982. Take 3 separate trials and obtain the average.•• How many pennies? ____________________• List the years of the pennies __________________________________________________________•• Trial 1 ___________________• Trial 2 ___________________• Trial 3 ___________________•• Average Mass of Pennies < 1982•• ___________________________

• B) Measure the mass of 20 pennies NEWER than 1982. Take 3 separate trials and obtain the average.• How many pennies? ____________________• List the years of the pennies __________________________________________________• Trial 1 ___________________• Trial 2 ___________________• Trial 3 ___________________•• Average Mass of Pennies > 1982• ___________________________

• Part 2• Determine the volume of the Pennies older than 1982 through water displacement. Take 3 separate trials and obtain the average.• How many pennies? ____________________• List the years of the pennies _______________________________________________________• Trial 1 Before _______mL after ________mL• Volume of Pennies ___________mL• Trial 2 Before _______mL after ________mL• Volume of Pennies ___________mL• Trial 3 Before _______mL after ________mL• Volume of Pennies ___________mL• Average Volume of Pennies < 1982• ___________________________

• B) Determine the volume of the Pennies newer than 1982 through water displacement. Take 3 separate trials and obtain the average.• How many pennies? ____________________• List the years of the pennies _______________________________________________________• Trial 1 Before _______mL after ________mL• Volume of Pennies ___________mL• Trial 2 Before _______mL after ________mL• Volume of Pennies ___________mL• Trial 3 Before _______mL after ________mL• Volume of Pennies ___________mL• Average Volume of Pennies > 1982• ___________________________

• Part 3• Calculate the average Density of the Pennies• Density of Pennies < 1982 • Average Mass ___________________ • Average Volume ___________________ • Average Density ___________________• Density of Pennies > 1982 • Average Mass ___________________ • Average Volume ___________________ • Average Density ___________________

• Part 4• Discussion:• Why is it best to use the results of three trials rather than a single real for determining the density?• Compare and contrast the calculated densities of the groups of pennies? How do you account for any difference?• Use the results of the investigation to formulate a hypothesis about the composition of the two groups of pennies. How could you test your hypothesis?• WEB RESEARCH: What happened during 1982 that may cause a change in the densities of the pennies?

Wk5 lab 4 density of pennies

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