Reviews the principles of Monte Carlo calculation and random number generation in an attempt to introduce the direct and the rejection method of sampling techniques as well as the variance-reduction procedures. Indicates that the increasing availability of computers makes it possible for a wider audience to learn about these powerful methods. (CC)

Discusses an experiment on the conservation of momentum and Q-values for elastic and inelastic collisions with frictional energy dissipation taken into account. Indicates that the apparatus is readily fabricated from easily available materials. (CC)

A description is provided of activities for a junior high school science and social studies unit on teaching the scientific method and interrelationships between the scientist and the social scientist. (Author/KM)

Discusses the theories, construction, operation, types, and advantages of fuel cells developed by the American space programs. Indicates that the cell is an ideal small-scale power source characterized by its compactness, high efficiency, reliability, and freedom from polluting fumes. (CC)

Article considers the Greek philosophers and those who later practiced Stoicism. The intent in this essay is to give an account of that philosophy, focusing especially on its implications for education. (Author/RK)

Article probes the procedure for uncovering scientific and unscientific attitudes manifested by students. (Author/RK)

Describes the origin of the Moon on the basis of the Apollo expeditions as an accumulated gas sphere at its very beginning and, later, a satellite captured by the Earth. Indicates that the model would be substantially believable if further observations should be proved to exist as estimated. (CC)

Presents a brief explanation of the solar system, including planets, asteroids, satellites, comets, planetary orbits, as well as, old and recent cosmogonic theories. Indicates that man is nearer a solution to the origin of the planetary system than ever before.

The question of whether modern experiments are limited by the uncertainty principle or by the instruments used to perform the experiments is discussed. Several key experiments show that the instruments limit our knowledge and the principle remains of strictly academic concern. (DF)