During the past 5 million years,approximately how long have chrons lasted before the next major magnetic polarity reversal?

Question

Quizplus · Accepted Answer

The question is asking for the approximate length of time between magnetic polarity reversals, or chrons, over the past 5 million years. The correct answer is (C) 700,000 to 1.5 million years, which is consistent with the average length of time between chrons during this period. Option (A) is too short, as 10-20 years is much too short to allow for the development and recording of a magnetic polarity reversal. Option (B) is too short as well, as 500-1000 years is too short for the average length of time between chrons. Option (D) is incorrect, as there have been documented magnetic polarity reversals during the past 5 million years.

During the Past 5 Million Years,approximately How Long Have Chrons