Presents part seven of a continuing presentation of exponential functions. Provided is an extension of the part six discussion, exponential population growth, to world population growth. (SL)

Told by a sixth-grade student, the article details the construction of a two meter tall paper mache model of a stegosaurus dinosaur. (CP)

Reports an undergraduate analytical chemistry experiment utilizing the high performance liquid chromatograph. (SL)

Describes an experiment investigating the polarization characteristics of light scattered from a dielectric cylinder. (SL)

Analyzes the physical explanation accounting for tendency of Laboratory spring-mass oscillators to swing sideways. (SL)

Describes an experiment giving precise results of solubility as a thermodynamics property. (SL)

Presents an imaginative story to be used to introduce elementary school students to the different properties and uses of "Polyox." Various ideas for using "Polyox" in elementary science are given. (MDR)

Describes the energy education program given for elementary school groups at the Museum of Science in Boston. Several energy machines or demonstrations are described and their use in this energy education program is outlined. Also some other suggestions to illustrate the use, storage, and transformation of energy are presented. (MDR)

Describes an experiment studying the decay of moth balls to demonstrate diffusion phenomena. (SL)

Describes a freshman physics laboratory experiment for approximating the mean free path in high density gases by measuring the mean free path of hockey pucks on an air table. (SL)

Describes demonstrations, some apparently paradoxical, which can be performed with commercially available magnetic stirrers. (SL)

Presents a triple pendulum used to demonstrate normal modes. Also discusses the mathematical similarity of the equations of three coupled quantum mechanical levels. (SL)

Describes an experiment for studying the dynamics of a soft spring. (SL)

Advances the thesis that philosophical questioning should precede or accompany children's participation in science activities in the elementary grades. (CP)

Describes an inexpensive photo transistor timing system, apparatus for measuring muzzle velocity, and an apparatus for exposing modes of coupled oscillators. (SL)