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The Curie Temperature
http://bingweb.binghamton.edu/~jbarker/demos/demo13.html
From DLESE Community Collection (DCC)
Comment on this resource
The Curie temperature for iron is reached at about 20 km depth in the Earth, and the temperature is much higher at the outer boundary of the Earth's core so that the iron there is no longer ferromagnetic (the electron spins in the iron can no longer align). This demonstration will help students understand the magnetic field of the Earth, and can help explain the variation of the direction of the field through time (the secular variation), the non-dipole field, and the fact that the field reverses its direction periodically (polarity reversals).
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
  • College (13-14)
Type of resource:
  • For the classroom:
    • Presentation / Demo
Subject:
  • Geological Sciences:
    • Geophysics
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Copyright and Other Restrictions Information is Unknown
DLESE Catalog ID: DLESE-000-000-006-238
Educational standards:
  • National Science Education Standards (NSES):
    • 5-8:
      • Unifying concepts and processes:
        • Evidence, models, and explanation
      • B - Physical science:
        • Properties and changes of properties in matter
      • D - Earth and space science:
        • Structure of the earth system
    • 9-12:
      • Unifying concepts and processes:
        • Evidence, models, and explanation
      • B - Physical science:
        • Structure and properties of matter
      • D - Earth and space science:
        • Origin and evolution of the earth system
Related resources:
This resource is part of 'Demonstrations of Geophysical Principles Applicable to the Properties and Processes of the Earth's Interior'
http://bingweb.binghamton.edu/~jbarker/demos.html
Resource contact / Creator / Publisher:
Author: Jeffrey S. Barker
Geological Sciences and Environmental Studies, Binghamton University