Learn how to use a balance scale. Place an item on each end of the scale. Then, identify the lighter and heavier object, as prompted, by clicking on it
A. Determine which of two objects is heavier or lighter
C. Determine which of two balance scales holds objects that are about the same weight
D. Identify which picture of objects on a balance scale matches a description of their weight (Level 1)
E. Identify which picture of objects on a balance scale matches a description of their weight (Level 2)