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Kao, Yvonne S.; Cina, Anthony; Gimm, J. Aura – Science Teacher, 2006
Scientists often have to observe and study surfaces that are impossible or impractical to see directly, such as the ocean floor or the atomic surfaces of objects. Early in the history of oceanography scientists dropped weighted cables to the bottom of the ocean. By moving across the ocean at regular intervals and keeping track of how deep the…
Descriptors: High School Students, Secondary School Science, Structural Elements (Construction), Scientists