Hypothesis: In the lab, I expect that the pennies before 1982 would be heavier than those that are after 1983 because the metal was initially changed because the earlier pennies cost more to make. So I think that since the heavier metal was more expensive to make, then they just used a cheaper metal. So if the metal was heavier it may have been more expensive to manufacture.
Procedure: 1. Choose either to use Pre-1982 or Post-1983 to start the experiment. Find the mass with the weight scale and then record it onto the data table.
2. Add 5 more pennies of the same kind then record the weight again.
3. Continue to repeat step 2 until you weighed all 25 pennies on the scale.
4. Fill the 50 mL graduated cylinder to 20 mL of water. Use the meniscus to measure the water level.
5. With the 25 pennies used before, drop 5 pennies into the water, and record the new water level.
6. Add 5 pennies again and record the new water level.
7. Repeat Step 6 8. Repeat Step 6 until all 25 the pennies are dropped into the graduated cylinder and all the volumes are recorded.
9. Dry the pennies and store them or give them to the teacher.
10. Do the same with the other set of pennies.
11. Find the net volume of both set of pennies. (Subtract 20 mL from the total volume).
12. Enter all data into specific columns.
Data and Observations: Data- 22mL-20mL = 2mL, 24mL-20mL = 4mL, 26mL-20mL = 6mL, 27.5mL- 20mL = 7.5mL, 29mL-20mL = 9mL Table 1- Pre-1982 22mL-20mL = 2mL, 23.5mL-20mL = 3.5mL, 25.5mL-20mL = 5.5mL, 27mL-20mL = 7mL, 29mL-20mL = 9ml Table 2- Post-1983 Observations- · The scale wasn't able to accurately pick up how much the weight of the first 5 pennies were. The mass inputted was the weight it was roughly around the