Find a
Select grade level(s) Select resource type(s) Select collection(s) Select standard(s) Skip navigation Digital Library for Earth System Education
Digital Library for Earth System Education
Search tips
Mid-Ocean Magnetism
In this lesson, students explore some of the magnetic evidence which led to the discovery of sea floor spreading. Students should have an introduction to plate movements and crustal processes before working on this activity. They will use compasses to simulate magnetometers, exploring a model sea floor (prepared by the teacher) which has concealed bar magnets. They will then be asked to explain how the magnetic field pattern they found relates to the pattern found on the floor of the Atlantic Ocean and why it is evidence for sea floor spreading. Links to background information on sea floor spreading are provided.
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
Type of resource:
  • For the classroom:
    • Classroom activity
    • Lesson plan
  • For the classroom:
    • Course
    • Syllabus
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Copyright 1998-2008 by Sea Education Association, all rights reserved.
DLESE Catalog ID: DLESE-000-000-009-033
Educational standards:
  • Geological Sciences:
    • Structural geology
  • Mathematics
  • Space science
Resource contact / Creator / Publisher:
Publisher: Sea Education Association

Contact: John Bullard
Sea Education Association