Simple text and photographs describe the tools needed to measure how heavy things are. Includes online content that contains weblinks, audio and video clips, activities, and other features.

AV2 book code -- Heavy or light? -- Gravity's effect -- Comparing weights -- Balancing act -- Ounces and pounds -- Tons and tons -- Metric system -- Estimate it -- Lots of units -- Measuring mania -- Key words/Log on to ww.av2books.com.