Volume = the amount of space an object takes up.
Volume can be measured using a graduated cylinder (for fluids) or water displacement (for irregular solids). For regular geometric solids, you can calculate the volume using an appropriate equation.
Rectangular Prism: V = l·w·h
Cylinder: V = π·r2·l
Units: Graduated cylinders are marked in milliliters (ml). Using the equation with lengths in centimeters (cm), they would produce a volume in cubic centimeters (cm3). Based on our measurements of volume in cm3 and ml, we discovered that 1 ml = 1 cm3.
We measured the mass and volume of several pieces of steel and aluminum.
* Graph this data on your lab packet. Determine the slope of each line.
* The slope represents the substance’s density. It tells us how much mass (g) there is in each unit of volume (ml or cm3), so units of density are either g/ml or g/cm3.
We also discovered that more dense things tend to sink and less dense things tend to float. Water’s density is 1.0 g/ml, so steel and aluminum both sink in water. Foam’s density is about 0.08 g/ml, so it floated on water. Air’s density is somewhere around 0.0012 g/ml, so air floats above water.
We did large parts of these worksheets in class. Finish the remainder for Monday.