9 Measuring Mass, Calculating Density - EZWebSite

Measuring Mass, Calculating Density • Activity 9
MATERIALS
For each group of four students
1 set of six objects:
light gray cube
dark gray cube
light gray cylinder
dark gray cylinder
light gray bar
dark gray bar
For each pair of students
1 balance
1 pair of plastic forceps
1 calculator
For each student
Student Sheets 8.1a and 1b, “Two Methods to
Measure Volume”
SAFET Y
Review the procedure, and decide on appropriate safety measures for
working with the unknown solids. If you do not know what material an
object is made from, assume it is hazardous until you prove otherwise.
PROCEDURE
Part A: Measuring Mass
1. Obtain the same set of objects you used in Activity 8, “Measuring
Volume.”
2. In your science notebook, create a data table similar to Table 1, ”Mass,
Volume, and Density of Six Objects,” on the next page. You will use it to
record your data and calculations.
3. Divide the six objects into two sets so that each pair in your group has
either the light gray set or the dark gray set. Each pair will begin by
determining the masses of the three objects in one set.
4. Use a balance to find the mass of each object to the nearest 0.1 gram (g).
Record your data in your table.
5. Exchange objects with the other half of your group, and repeat Step 4.
A-37