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Origin of The Earths Magnetism
This site holds information on the Dynamo Theory, the suspected cause of Earth's magnetic field. The Earth's magnetism seems to come from fluid motions in the Earth's core, from circulating flows that help get rid of heat produced there. The author discusses the Blackett proposal and shows why it cannot be correct. He also points out some of the problems with the Dynamo Theory.
Intended for grade levels:
  • High (9-12)
  • College (13-14)
Type of resource:
  • Text:
    • Ref. material
Subject:
  • Geological Sciences:
    • Geophysics
  • Physics
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
May be used non-commercially as long as credit is given to the author.
DLESE Catalog ID: DLESE-000-000-005-205
Educational standards:
  • National Science Education Standards (NSES):
    • 9-12:
      • Unifying concepts and processes:
        • Evidence, models, and explanation
        • Systems, order, and organization
      • A - Science as inquiry:
        • Understandings about scientific inquiry
      • B - Physical science:
        • Interactions of energy and matter
        • Motions and forces
      • D - Earth and space science:
        • Energy in the earth system
        • Origin and evolution of the earth system
      • G - History and nature of science:
        • Nature of scientific knowledge
        • Science as a human endeavor
Related resources:
This resource is part of 'Physics and Astronomy Education Files (title provided or enhanced by cataloger)'
Resource contact / Creator / Publisher:
Author: Dr David P. Stern
Goddard Space Flight Center