Suppose that you have a map on which 1 inch represents 30 miles. You trace a state on the map, cut out your tracing, and draw this tracing onto card stock. Using a scale, you determine that a full 8 1/2-inch-by-11-inch sheet of card stock weighs 10 grams. Then you cut out the tracing of the state that is on card stock and weigh this card stock tracing. It weighs 5 grams.
