Defines thermal expansion and elaborates on the concept of linear expansion. Provides the equation for linear expansion and includes an interactive JavaScript form which allows the visitor to investigate the relationship between...

Play is an important vehicle for developing self-regulation as well as promoting language, cognition, and social competence. This chapter discusses the definition of the physical environment and play, the defining characteristics of...

Scientists take important steps toward a fuller understanding of electricity, as well as some fruitful missteps, including an elaborate but incorrect theory on animal magnetism that sets the stage for a groundbreaking invention.