Density of Metal Rods
Question: How accurately can we calculate the density of 4 metal rods?
Data: Using Displacement Volume Complete the following data table
using displacement volume of the rods.
METAL ROD
MASS (g)
VOLUME (mL)
DENSITY (g/mL)
Graph: Draw a triple bar graph. Each metal should have 3 bars…one for the
density you calculated using displacement volume, the second bar should
show the density using formula volume and the third bar will be the actual
density for each metal (listed below). Use 3 different colors and make a key
to explain what each color represents.
Actual Densities:
Brass = 8.6 g/cm3
Aluminum = 2.7 g/cm3
Steel = 7.4 g/cm3
Copper = 8.9 g/cm3
Brass
Steel
Aluminum
Copper
Data: Using Formula Volume First, find the volume for one rod using the
formula. The formula for calculating volume is V = (3.14)r2h.
Radius = _______
METAL ROD
Brass
Height = _______
MASS (g)
Volume = __________
VOLUME (cm3)
DENSITY (g/
cm3)
Conclusion
Which calculation of density was closest to the actual density?
Steel
What could you do to make your calculations closer the actual density?
Aluminum
Copper