Describes a method of recording the number of particles scattered at various angles for different impact parameters in an experiment illustrating the Rutherford scattering of alpha particles. (JR)

Describes 22 ways in which nails can be used in providing inexpensive materials for science instruction. (JR)

Evaluates the effect of the Apollo program on the geology of the Moon to determine further study problems. Concludes that the National Aeronautics and Space Administration can provide excellent justification for its extension since human beings have the possibility of using the rocks in ways not currently conceived. (CC)

Presents current ideas about the fission process of the Moon, including loss of mass. Saturnian rings, center of the Moon, binary stars, and uniformitarianism. Indicates that planetary formation may be best explained as a destructive, rather than a constructive process. (CC)

Presents examples which illustrate the importance of space exploration in diverse aspects of scientific knowledge. Indicates that human beings are today not wise enough to anticipate the practical benefits of planetary studies. (CC)

Discusses experimental evidence for the existence of organic material in the solar system prior to the earth's formation. Indicates that the earth could have received much of its organic compounds from meteors falling on its primitive surface. (CC)

Describes many ways in which string can be used in constructing simple apparatus for the science classroom and laboratory. (JR)

Summarizes the scientific activities of the Apollo program, including findings from analyses of the returned lunar sample. Descriptions are made concerning the possible origin of the moon and the formation of the lunar surface. (CC)

A simple experiment is proposed that can provide the student with some insight into the chemical properties of solids. It also demonstrates the relationship between the Gibbs free energy of formation of an ionic solid and the emf of an electrochemical cell. (DF)