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Hoehn, Robert G. – Science Activities, 1973
Descriptors: Earth Science, Geology, Instruction, Laboratory Experiments
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Hoehn, Robert G. – Science Activities, 1972
Descriptors: Class Activities, Earth Science, Elementary School Science, Geographic Concepts
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Hoehn, Robert G. – Science Activities, 1977
Describes classroom science demonstrations and experiments that simulate the process of fossil formation. Lists materials, procedures and suggestions for successful activities. Includes ten student activities (coral fossils, leaf fossils, leaf scars, carbonization, etc.). Describes a fossil game in which students work in pairs. (CS)
Descriptors: Biology, Earth Science, Geology, Instructional Materials
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Hoehn, Robert G. – Science Activities, 1978
Describes methods of making fossil models in the classroom. Step-by-step directions, as well as discussion questions, are given. A film and filmstrip is included. (MA)
Descriptors: Curriculum Enrichment, Earth Science, Elementary Secondary Education, Geology
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Hoehn, Robert G. – Science Activities, 1972
A mixture of dough, using pancake flour, is used to represent the molten state of the earth billions of years ago. A simple experiment is designed to demonstrate that the earth's internal forces result from its unequal heating and cooling. Procedures are given to test this model with four theoretical hypotheses. (DF)
Descriptors: Audiovisual Aids, Earth Science, Educational Media, Geology
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Hoehn, Robert G. – Science Activities, 1974
Describes student activities with mercuric oxide and mercury that help them to form models of the solar system and its creation. (JR)
Descriptors: Astronomy, Earth Science, General Science, Laboratory Procedures
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Hoehn, Robert G. – Science Activities, 1978
Describes procedures that can help students to make model geodes from eggshells, copper sulfate, and other crystalforming substances. (HM)
Descriptors: Earth Science, Elementary Secondary Education, Geology, Instruction
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Hoehn, Robert G. – Science Activities, 1978
Provides hints for teaching a unit on fossils, with special emphasis on the use of field trips. Suggests several points for a successful field experience and describes how the author used local fossil sites to involve students in field trips. (MA)
Descriptors: Earth Science, Field Instruction, Field Trips, Geology
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Hoehn, Robert G. – Science Activities, 1979
Presents activities for the fossilization process by using rust prints to simulate fossils. Photographs illustrate the procedures described. (HM)
Descriptors: Chemical Reactions, Earth Science, Educational Media, Laboratory Procedures