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Geologic Time: the History of Earth
This interactive tutorial provides students with an overview of Earth's history and its relation to geologic time. Topics include the age of the Earth, the use of timelines, and the concepts of relative and actual age. Once these topics have been covered, their applications to rocks and fossils are explained through the concepts of superposition (oldest rocks on the bottom), the use of fossils to determine relative age, and the use of radiometric dating to determine absolute age. There is also an interactive geologic time scale where students can find descriptions of what the Earth was like by clicking on the various eons, eras, or periods.
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
Type of resource:
  • For the classroom:
    • Computer activity
    • Tutorial
  • Geological Sciences:
    • Geologic time
    • Geology
    • Paleontology
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Copyright and other restrictions information are unknown.
DLESE Catalog ID: DLESE-000-000-008-864
Related resources:
This resource is part of 'Understanding Geologic Time'
Resource contact / Creator / Publisher:
Publisher: University of California, Berkeley
Museum of Paleontology

Contact: Judy Scotchmoor
Museum of Paleontology
University of California, Berkeley