Piece by piece, geologists constructed a geologic time scale, using increasingly more sophisticated methods for dating rock formations. At the end of seventh grade, students will have completed an activity introducing the various geologic time scales and the eras.
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Picture of a tube-nosed fruit bat found in Papua New Guinea. To access what the students. Provides a virtual journey through the history of the Earth. Prehistoric time line, geologic time scale, photos, facts, maps, and more from National.
