As magma rises from the mid-ocean ridge, it cools and solidifies. As this magma solidifies, some of the minerals align with Earth's magnetic field. Every few million years, Earth's magnetic field reverses. The reversal is recorded in the magma that solidified after leaving the mid-ocean ridge. In this picture, these magnetic reversals are indicated by dark and light bands.



How can scientists tell when the reversals of the magnetic field occurred?

Question 15 options:

by measuring the thickness of the different bands of the oceanic crust.


by measuring the distance between the mid-ocean ridge and the ocean floor band


by measuring the amounts of minerals that aligned to Earth's magnetic field in the different bands


by measuring the strength of Earth's magnetic field recorded in the solidified magma of the oceanic crust.