Summarized are factors that have been identified as playing a role in the continued strength of the geology department at Carleton College. Discussed are the local environment, curriculum, teaching methods, and the atmosphere of the department. Suggestions for increasing the strength of academic geology departments are provided. (CW)

Discussed are procedures for increasing understanding and appreciation of geology among undergraduates. Included are using student-centered approaches, deemphasizing the use of conventional textbooks, increasing the use of nonspecialized field programs, and increasing the experimental dimensions of geology programs. (CW)

Presented are lessons which bridge the gap between concrete and abstract ideas by introducing students to the valuable idea of scale as it relates to space science. Included are information and activities on relative size, position, and orbital patterns of planets using mathematics to construct models. (RT)

Israeli children's (kindergarten to grade nine) explanations about the water cycle are described. Reports the children's views about the source of clouds and the mechanism of rainfall. It was concluded that understanding evaporation is a necessary condition for explaining a mechanism of rain containing the ideas of condensation and heaviness. (YP)

Discussed is the importance of marine education and experience with the seashore in helping children to adopt positive attitudes about nature. (CW)

Presents examples where mathematical and physical reasoning complement each other in interpreting and analyzing some basic science concepts using proof by contradiction and contrapositive. Examples involve the rotation of the moon, the stability of electrons and protons, the electron's orbit about the nucleus, and the earth's liquid core. (MDH)

Presents a lesson plan about greenhouse effect and global warming. Includes diagrams and graphs from which students are asked to make inferences. Provides background information about how energy enters and leaves the earth system, the energy budget, consequences of obstructing the energy balance, and the greenhouse effect. (three references) (MCO)

The Hubble Space Telescope project is described. Discussed are the project directors, construction, launch, deployment, hazards, rationale, and hope of the project. (CW)

Presented is the best understanding of the flaw discovered in the optics of the Hubble Space Telescope and the possible solutions to the problems. The spherical aberration in the telescope's mirror and its effect on the quality of the telescope's imaging ability is discussed. (CW)

Describes a project that addressed the problem of courseware reusability by developing a database structure suitable for organizing multimedia learning material in a given content domain. A prototype system that allows browsing a DBLM (Data Base of Learning Material) on earth science is described, and future plans are discussed. (five references)…

A learning cycle activity which allows students to practice process skills by sieving different size fractions of sediments is described. Science topics include weathering, erosion, streams, sedimentation, sedimentary rocks, soils, beaches, dunes, or glacial deposits. Mathematics topics include number lines, ordinal numbers, greater than/less…

Describes a lesson plan for use in physical geography, earth science, and social studies classes. Suggests that students will find the problem solving approach interesting and will use knowledge of earth-sun relationships, absolute location, and place. Includes objectives, two days of learning activities, evaluations, resources, and an activity…

Changing ideas about the origin of the Silurian Clinton oolitic ironstones in eastern United States provide an instructive example of how interpretations develop as knowledge increases. (PR)

The principles of magma addition and liquid layering in magma chambers can be demonstrated by dissolving colored crystals. The concepts of density stratification and apparent lack of mixing of miscible liquids is convincingly illustrated with hydrous solutions at room temperature. The behavior of interstitial liquids in "cumulus" piles…

Describes an activity where students find the locations and elevations of their homes, school, favorite parks and lakes, and other significant places as they learn topographic skills and unique features of the community. (PR)