JWhen new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. This is because the rocks on the two sides of the ridge _____.

Question

are equal in width and in polarity

are polar opposites

vary in width but are equal in polarity

are magnetized

Answer 1

The correct answer is are equal in width and in polarity.

During sea-floor spreading at an oceanic ridge, new rock is formed and magnetized in alignment with the Earth's magnetic field. As this occurs, the newly formed rock on either side of the ridge displays symmetrical magnetic stripes that are equal in width and polarity, reflecting the periodic reversals of the Earth's magnetic field over time. This pattern serves as evidence of the process of sea-floor spreading.