Download Magnetic Reversals and Seafloor Spreading

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Name: _____________________________________ Period: _____ Date: _________________________
1. Was the Earth’s magnetic field “normal” or reversed 65 million years ago?
2. About how long ago was the last time Earth’s magnetic field reversed?
3. Can you see any pattern on how often Earth’s magnetic field reverses? Cite evidence to support
your response.
4. How would this history of reversals show itself on the ocean floor?
5. From this graph, when would you predict the next reversal will occur? Cite evidence to support your