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Measuring Mass with a Two-Pan Balance
It is important to wait until the pans are still. If two objects balance, they have the same mass. Also, if the two pans are level, the objects they contain have the same mass. If the arm of the balance tilts lower on one side, the object in the lower pan has more mass than the object in the other pan.
In order to measure mass we need a unit of measure. Common metric units of mass are the gram (g) and the kilogram (kg). One kilogram is 1000 grams. We measure the mass of small objects in grams and the mass of large objects in kilograms. The mass of a centimeter connecting cube is one gram. The mass of a third-grader is about 25–40 kilograms.
- Complete the table for the Function Machine to compare kilograms to grams.
