Provides instructions for producing a spectrum in the secondary science classroom. Offers suggestions for using the spectrum and discusses how to make a rainbow using a garden hose or houseplant sprayer. (JN)

Discusses the concepts of weight and weightlessness and describes simple activities which can be used to demonstrate weightlessness. (JR)

Describes eight investigatory science activities that can be used to study concepts related to heat. (PS)

Provides directions for construction of a working model of the eye and specifies some experiments using this model. (PEB)

Discusses the nature of virtual images and how they can be plotted and used to reveal important relationships between objects and their mirror reflections. Describes some applications of virtual images in the theater and classroom. (JR)

Describes a number of activities designed to assist student understanding of the phenomenon of light bending when it passes from one meduim to another. (JR)

Describes a series of optical illustions designed to explore the nature and behavior of light, the mechanics and optical principles of eyes, and the brain's learned ability to interpret what we see. (BR)