The Bowl Does Not Belong on the Bill
Two informational texts explain how weights and measures inspectors and produce vendors help customers pay for the weight of their food, not its container.
Play the quiz as a gameText 1: The Inspector's Test
A market scale helps a vendor decide how much to charge for apples or potatoes. If the scale adds weight that is not really there, a customer may pay too much. If it shows too little, the vendor may lose money. Both people need an accurate measurement.
A weights and measures inspector checks measuring tools used in businesses. To test a market scale, the inspector uses special test weights. Each has a known weight and serves as a standard, or trusted point of comparison. If a test weight weighs five pounds, a correctly working scale should display five pounds when that weight rests on it.
One correct reading is not enough. The inspector tries different test weights because a scale might measure a small load correctly but struggle with a larger one. The inspector may also place a weight in different spots on the platform, the flat surface that holds the goods.
A scale that fails inspection needs attention. A trained worker may adjust or repair it before it is checked again. In many communities, a scale that passes receives an inspection sticker. That sticker shows that the scale met the requirements when it was tested.
Text 2: At the Produce Stall
An inspected scale still needs careful use. Before weighing produce, a vendor checks that the empty scale displays zero. A piece of cardboard caught under the platform can interfere with its movement. Clearing the space around the platform helps it move freely.
The vendor must also account for a container. Imagine that a customer chooses apples in a reusable bowl. The customer is buying the apples, not the bowl's weight. Placing the full bowl on the scale without another step would count both.
To solve this problem, the vendor first sets the empty bowl on the scale and presses the tare button. This button resets the display to zero with the bowl still in place. When the apples are added, the scale subtracts the bowl's weight from the total. The result is the net weight: the weight of the goods without their container.
The vendor repeats this step for a different bowl, since containers can weigh different amounts. The customer can watch the display while the produce is weighed. Inspection checks the tool, while careful weighing uses that tool properly. Together, these jobs help make a market purchase fair.