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Deep Time: The Geologic Time Scale
This page examines the issues involved in teaching students about the geologic time scale. There are suggestions for tackling troublesome issues in class as well as activities that can be used to clarify how geoscientists look at deep time. Five main concepts with which students struggle when thinking about Deep Time are addressed here: imagining or comprehending big numbers; the difference between relative and numerical age; the concept of "timescales"; the ways we know about the age of the Earth and other materials; and resolving perceived issues with religious beliefs.
Intended for grade levels:
  • Intermediate (3-5)
  • Middle (6-8)
  • High (9-12)
Type of resource:
  • For the classroom:
    • Guide for instructor
    • Presentation / Demo
  • Text:
    • Ref. material
Subject:
  • Geological Sciences:
    • Geologic time
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
We encourage the reuse and dissemination of the material on this site for educational, noncommercial purposes as long as attribution is retained. To this end the material on this site is offered under a Creative Commons license.
DLESE Catalog ID: DLESE-000-000-008-960
Resource contact / Creator / Publisher:
Publisher: Carleton College
The Science Education Resource Center (SERC)
http://serc.carleton.edu/