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



• 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

_______________________________________________________




• 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?

Education

Wk5 lab 4 density of pennies