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An Introduction to Geomagnetism
This tutorial introduces students to geomagnetism, the Earth's magnetic field, and its changes through time and space. Topics include the properties of Earth's magnetic field, how it makes a compass work, and why Earth has a magnetic field. There is also discussion of magnetic reversals, a set of links to additional reading and resources, and a set of classroom activities on the basic properties of magnetic fields and Earth's changing magnetic field.
Intended for grade levels:
  • Intermediate (3-5)
  • Middle (6-8)
  • High (9-12)
Type of resource:
  • For the classroom:
    • Classroom activity
  • Visual:
    • Illustration - scientific
    • Imagery - remotely sensed
  • Text:
    • Ref. material
  • Geological Sciences:
    • Geophysics
Technical requirements:
Some resources require Adobe Acrobat reader
Cost / Copyright:
No cost
NASA still images, audio files and video generally are not copyrighted. You may use NASA imagery, video and audio material for educational or informational purposes, including photo collections, textbooks, public exhibits and Internet Web pages. This general permission extends to personal Web pages. This general permission does not extend to use of the NASA insignia logo (the blue "meatball" insignia), the retired NASA logotype (the red "worm" logo) and the NASA seal. These images may not be used by persons who are not NASA employees or on products (including Web pages) that are not NASA sponsored.
DLESE Catalog ID: DLESE-000-000-009-911
Resource contact / Creator / Publisher:
Publisher: National Aeronautics and Space Administration (NASA)
Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) Education and Public Outreach

Author: Dr Sten Odenwald
National Aeronautics and Space Administration (NASA)