Answer:
Scientists can determine the age of the seafloor by examining the changing magnetic field of our planet. ... While it cools down, it records the magnetic field during its formation. The two parts of the oceanic plate are pulled apart, and magnetic stripes become older as they move away from the mid-ocean ridge.
Step-by-step explanation:
I didn't know so I googled it and this is what it came up with. I hope this helps!!