Analysis/Conclusion: In the first part of the experiment, the steel, aluminum, copper, and brass cylinders were measured on a balance scale to determine the mass, in grams, of each of the cylinders (Edwards, 2011). The diameter and height of the cylinders were measured in centimeters using a vernier caliper, which allows for a more accurate measure of the outer and inner diameters. In part I of the experiment, 6 aluminum cylinders were for mass, diameter, and height. A balance scale and a vernier caliper were used to obtain the appropriate measurements (Edwards, 2011). The volume of each of the cylinders was determined using the equation V=(d2/4)h. A graph was constructed to portray the relationship between the mass and the volume of the cylinders (Figure 1). The slope of the best-fit line corresponds to the experimental average densities of the aluminum cylinders. The slope of the line was 2.787 g/cm3, which shows a slight deviation of 3.2% from aluminum’s actual density of 2.700 g/cm3 (Density of Metals, 2010). The experimental values gathered from part II of the experiment, for iron, brass and copper showed the greatest percent error. Copper showed the greatest deviation from it’s theoretical value having a percent error of 14.7%, while iron showed a percent error of 2.41%. Since both of them had a percent error of greater than 1%, it accounts for the uncertainties of the measuring instruments. For part III of the experiment, when measuring the volume of the irregular-shaped lead sample, the technique of displacement of water in a graduated cylinder was used (Edwards, 2011). The increase in water after the sample was submerged in the graduated cylinder represented the volume of the object. The mass of the sample was recorded by using a balance scale. To determine the density of the sample, the equation Density= mass/volume was used. The density of