Discusses an experiment which illustrates the non-mixing properties of water at normal temperature with oil because of water's strong, open-ended hydrogen bonding interactions. Examples of the mixing properties between non-interacting substances and the near-complete mixing between water and solvents with limited H-bonding capacity are also given.…

Reports the results of a study conducted in Virginia to gather information concerning the background of earth science teachers, opinions of these teachers regarding earth science education, and information regarding curriculum and materials for earth science education. (JR)

Describes several demonstrations designed to dispel student misconceptions relating to falling bodies. An object moving with a horizontal velocity is shown to fall to the earth as quickly as a free falling object dropped from the same height. (JR)

Discusses the history of the Vanguard project and the findings in Ranger records and Apollo missions, including lunar topography, gravity anomalies, figure, and chemistry. Presented are speculative remarks on the research of the origin of the Moon. (CC)

Summarizes the development of a new analytical technique on the basis of the interaction of alpha particles with matter and its applications to three Surveyor missions and other space investigations. Discusses the implications of the alpha-particle instrument findings for the nature of the Moon. (CC)

Discusses theories underlying the phenomena of solution viscosities, involving the Jones and Dole equation, B-coefficient determination, and flickering cluster model. Indicates that viscosity measurements provide a basis for the study of the structural effects of ions in aqueous solutions and are applicable in teaching high school chemistry. (CC)