Question #N578
The main purpose of the passage is to argue that it’s difficult to know when the Earth’s magnetic field will reverse. The author emphasizes this point by noting that the field has reversed “hundreds of times” in the past but that “no one knows for sure” when the next reversal will occur. The author also acknowledges that the field is changing right now, suggesting that a reversal could be occurring soon. In the following passage, the author’s main purpose is to
What is the most likely reason why the author states that the Earth’s magnetic field has reversed “hundreds of times” in the past?Correct Answer is: A
The author states that the Earth’s magnetic field has reversed “hundreds of times” in the past to illustrate that the field is unpredictable. The author’s main goal is to emphasize that the field is constantly changing and that no one knows when the next reversal will occur. While the author mentions the history of the Earth’s magnetic field, the author’s main purpose is to emphasize the unpredictability of this phenomenon.