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Scientists know the history of earth’s magnetic field because.
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Scientists know the history of earth’s magnetic field because.

User Ken Le
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Answer:

THE MAGNETIC FIELD BECOMES FROZEN INTO ROCKS, AND PLATE TECTONICS SPREADS THOSE ROCKS OUT

Step-by-step explanation:

we can study the orientation of structures in rocks to determine where the field lines pointed, and by dating those rocks, we can trace the changes of the earth's magnetic field

User Jeremy Thomerson
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