STC Program: Balancing and Weighing Unit Kit, 3rd Edition

In Balancing and Weighing, students explore balance and discover that it is affected by three variables - the mass of an object, the length of the lever arm, and the position of the fulcrum. Using an equal-arm balance to conduct their investigations, students learn to measure mass and are able to arrange objects in serial order according to their mass. Students discover that mass is not directly related to volume as they measure the mass of equal volumes of foods.