VOLUME AND DENSITY OF IRREGULAR SHAPED OBJECTS (20pt)
QUESTION (copy 1pt): What equipment do I need to find the volume, mass, and density of an irregular
shaped object?
HYPOTHESIS (copy/complete 2pt): I need a ____________ ____________ to find the volume and a _____________
to find the mass so I can calculate density of the object.
MATERIALS (copy 1pt): record items on your lab table
DATA TABLE (10 pt): copy from back page before starting procedures
PROCEDURES: (all bolts must be completely covered with water)
1. Find the mass of 1, 2, 3, and 4 bolts. You cannot just multiply, or add, to the masses for 1 and 2bolts
because they are all a little bit different.
2. Start with approximately 60 ml of water in the graduated cylinder and record the volume as accurately
as possible.
3. Add the first bolt to the water; be careful not to splash any of it out of the cylinder. Record the new
volume in the data table.
4. Now add the second bolt (carefully) and record the new volume. Remember that your beginning water
level is the same as for the one bolt since you do not dump out or add any of the water.
5. Add a 3rd bolt (record the end volume) and then the 4th bolt (record the end volume).
6. Complete the rest of the data table by subtracting to find the volume of the different number of bolts.
Since you are not adding any water, the difference between the start volume and end volume is due to the
volume of the bolt(s) that are in the water. This is how you find volume with the displacement method.
7. Now calculate the density for 1, 2, 3, and 4 screws. Remember: Density = Mass divided by Volume
Data Table
Total # of bolts
Total Mass
(g)
Start water
volume (ml)
End volume of
Total volume Density of bolt(s)
water and bolts of bolts (ml) D=mass (g/ml)
(ml)
End -- Start
volume
1 screw
2 screws
3 screws
4 screws
Conclusion: (Answer in complete sentences.)
1. How do you find the volume of an irregular shaped object?
2. Construct a Density graph with Volume on the x-axis and Mass on the y-axis (use line of best fit).
Include: Title, Label (name, number, units) x-axis and y-axis, 4 data points, line of best fit
3. What can you say about the density values for 1,2,3, and 4 bolts (are they the same or different)?
4. If a box has the dimensions of 5 cm X 5 cm X 5 cm, what is the volume of the box? (show work)
5. If 4 bolts have a total volume of 12 ml or 12 cm3, then about how many will fit into that box? Explain!
6. How big of a box do you need for 100 bolts? Explain your answer.