Discussed are science activities appropriate for middle school students. Considerations include the degree of abstractness of the concepts and the need for increased class time for explaining, discussing, and integrating students' activity experiences. (DS)

Described is the use of analogy in teaching abstract chemical concepts. A foreign universe is postulated and nuts, bolts, and washers play the roles of atoms and molecules in this universe. (DS)

Described is an activity centered interdisciplinary science course made up of one investigation from the area of astronomy, geology, chemistry, biology, and physics. Each investigation requires different techniques, preparation and analysis. (DS)

Describes different evaluation techniques of student performance in the science laboratory. Evaluation techniques discussed include written reports, test items, practical tests, and observational assessment to evaluate both student performance and to promote development of specific skills. (DS)

Described are several homework activities for use in teaching Astronomy. Topics include optical telescopes, the sun, and facts about the solar system. The format is a series of true-false questions related to diagrams which students must complete. (DS)

Presents activities for the fossilization process by using rust prints to simulate fossils. Photographs illustrate the procedures described. (HM)

Summarizes a theoretical approach using nonbonding MO's and perturbation theory to correlate properties of saturated hydrocarbons. Discussion is limited to correctly predicted using this method. Suggests calculations can be carried out quickly in organic chemistry. (Author/SA)

Describes a nuclear debris collector which removes trace substances from the lower atmosphere during rainfall. Suggests that the collector could be implemented into courses at various educational levels and could result in developing a network for monitoring the geographical extent of nuclear contamination. (Author/SA)

Describes a laboratory experiment which demonstrates manipulation of highly reactive chemicals, use of a gas trap, and simple and reduced pressure distillation. Student must characterize starting material and product with nuclear magnetic resonance and infrared spectroscopy. (Author/SA)

Presents information intended to encourage students to become thoughtful consumers. Discusses the role of pepsin in splitting off amino acids from stomach proteins and the nature of the protein substrate in determining the ph at which pepsin operates. Directions for an experiment are included. (Author/SA)

Presents reasons for utilizing abandoned railroad tracks in ecology field trip studies. Explanations are given for the factors influencing railroad vegetation. Activities for students are suggested. (SA)

Describes the status of teaching physics at Xaverian High School, Brooklyn, New York. The enrollment of students in physics, instructional materials, laboratory activities, and coordination between physics and mathematics are described. (HM)

The controversial issue of fur trapping is addressed in this article. It focuses on ways to incorporate humane education into the curriculum, using, for example, values clarification, the biology of the animals, and field trips. (SA)

Describes a method utilized at Iowa State University for teaching a biochemistry laboratory course for non-majors involving the use of student independent projects and experimental choices. (BT)

This is an experiment for college chemistry students in which they are introduced to gas phase and aerosal analysis and the chemical nature of cigarette smoke and its health hazards. (Author/SA)