Describes an exhibit at the Smithsonian Institution, representing 35 epochal scientific advances. The collection includes part of a collection of 11,000 first editions of such works as Darwin's "Origin of Species" and Lyell's "Principles of Geology." (SA)

Discusses hazards associated with the permanganate demonstration of volcanic eruptions. Alternate demonstrations are described, including the ammonium dichromate reaction, lava flow demonstration with baking soda and vinegar, and punk to illustrate air pollution from volcanic ash and cinders. (CS)

Describes a one-week unit in Earth science for the elementary science classroom. The concepts included are land formation, erosion, the water cycle, and human impact on the Earth's surface through planning and building a massive outdoor drainage model. (Author/DS)

Details an activity in which students create and study miniature impact craters in the classroom. Engages students in making detailed, meaningful observations, drawing inferences, reaching conclusions based on scientific evidence, and designing experiments to test selected variables. (DDR)

Presents a unit that focuses on landslides and integrates earth science, physics, chemistry, and math. Includes activities to investigate porosity, permeability, cohesion, saturation, and gravity. (JRH)

Presents activities that allow students to think about the Earth in a contextual manner and become familiar with constructive and destructive processes as they relate to sand - its origins, cyclical processes, and yielding of new products. Explores the bigger idea with a developmentally appropriate study of water, rocks, sand, physical phenomena,…

Explains the design of a planetarium that can be used by middle school teachers to teach earth science concepts such as the solar system, the lunar cycle, and seasons. Includes materials and procedures for making the planetarium. (SOE)

Explores how various teaching formats of computer-assisted instruction (CAI) influence student science learning outcomes in the secondary classroom. Compares teacher-directed CAI (TDCAI) and student-controlled CAI (SCCAI) in a compulsory earth science course in a secondary school in Taiwan. Indicates that TDCAI students had significantly higher…

Provides a description of a program in Maine that emphasizes the relevance of earth science to students' everyday lives with classroom activities that address real societal issues such as wise management of habitats. Includes two of the activities from the curriculum materials. (DDR)

Describes Jigsaw Teaching, a cooperative learning approach, in relation to mineral identification. This technique may also be applied to rock identification. Students work in groups of four and learn to identify 20 minerals, becoming an "expert" on five of them. Helping to teach other students reinforces what each student has learned.…

Introduces a laboratory experiment that investigates the key factors in determining the depth or diameter of an impact crater. (YDS)

Described is an alternative method of term paper preparation which provides a step-by-step sequence of assignments and provides feedback to the students at all stages in the preparation of the report. An example of this model is provided including 13 sequential assignments. (CW)

Discussed are the reasons for the changing of the seasons on earth. Included are 27 activities which can be used to teach geography and the seasons. Diagrams of planetary motion and climatographs are presented. (CW)

Significant information on the relative thickness of plutons, the structure of poorly exposed or concealed magnetic units, and possible evidence of mineralized ground are discussed. The techniques used to produce images that reveal the new information are described. A list of 34 references is included. (CW)

Presented is a science activity which explains the discrepancies found between summer and winter solstice sunrise and sunset times. Used is a mathematical equation which takes into account the earth's changing speed and the tilt of the earth. (KR)