Almost everything people have ever done has involved materials. Historical evidence indicates that "engineered materials" have been available and utilized for the benefit of humankind since the Neolithic period, beginning about 10,000 BC. Some of these materials have been in existence for thousands of years. At first, materials consisted of wood,…

Describes the technology of the recycling process for high density polyethylene plastics; illustrates a way for technology teachers to demonstrate the process. (SK)

This student learning activity explores the history and evolution of packaging technology and concerns about plastics and other packaging materials. (SK)