Mass is the amount of matter in an object. When you record mass the unit you use is grams. A medium sized leaf is about 1 gram, a potato chip 2 grams. A larger unit of mass is a kilogram. A kilogram is about the mass of a medium sized textbook. You need a balance to find mass. There are many kinds of balances. The gram is the unit used to measure mass. Mass is a measure of the amount of matter in an object. Mass is different from weight. Weight is the measure of gravitational pull. Your weight on the moon is less because there is not a strong gravitational pull. Mass, on the other hand, is the same anywhere in the universe. Mass is measured with a balance. One balance is a double pan