Describes purpose and use of elementary school earth science field instruction sites. Scientific concept and methodology objectives are given. General principles for earth science site model selection and implementation are discussed. Operationof site model program in New York City is explained. (JM)

Presents the procedures, results, and conclusions of a study designed to examine the efficacy of visual advance organizers for learning earth science concepts. (LC)

Perceptual orientation (field dependence/independence) was related to 47 biology/earth science students' attitudes toward science. In addition, students who were field dependent and possessed a positive attitude scored significantly higher on a science achievement test than students who were field dependent and possessed a negative attitude. (JN)

Describes two- and three-year undergraduate curricula for training earth science technicians at Sir Sanford Fleming College (Canada), emphasizing practical aspects and close student-faculty interaction. List of employment opportunities for geology graduates based on past placement data and geology curriculum outline are provided in tables. (JN)

The earth's oceanic crust is created and destroyed in a flow outward from midocean ridges to subduction zones, where it plunges back into the mantle. The nature and dynamics of the crust, instrumentation used in investigations of this earth feature, and research efforts/findings are discussed. (JN)

Discusses the earth's biosphere, considering how the microbial, animal and plant life (which make up the biosphere) are sustained by the earth's lithosphere, hydrosphere, and atmosphere. Also considers how these three earth features have powerfully shaped the evolution of these organisms. (JN)

Materials needed and instructions for constructing a model (groundwater terrarium) to examine the water cycle and its effects are provided. Suggested activities and demonstrations are also provided. (SK)

Highlights current information on the martian surface. Topics include a planetary overview (atmosphere, dust storms, water vapor/ice, soil analysis) and surface features (craters, volcanoes, canyons/channels, polar regions, wind-related features). Similarities/differences between Mars and Earth are also discussed. (JN)

In addition to oceans, the earth is subjected to tidal stresses and undergoes tidal deformations. Discusses origin of tides, tidal stresses, and methods of determining tidal deformations (including gravity, tilt, and strain meters). (JN)