Wk5 lab 4 density of pennies
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Density of Pennies Lab
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Wk5 lab 4 density of pennies
- 1. 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.
- 2. 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 • • ___________________________
- 3. • 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 • ___________________________
- 4. • 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 • ___________________________
- 5. • 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 • ___________________________
- 6. • 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 ___________________
- 7. • 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?