Consider the following statements: Statement I: Scientific studies suggest that a shift is taking place in the Earth’s rotation and axis. Statement II: Solar flares and associated coronal mass ejections bombarded the Earth’s outermost atmosphere with a tremendous amount of energy. Statement III: As the Earth’s polar ice melts, the water tends to move towards the equator. Which one of the following is correct in respect of the above statements?
- A.Both Statement II and Statement III are correct and both of them explain Statement I
- B.Both Statement I and Statement II are correct, but Statement II does not explain Statement I
- C.Only one of the Statements II and III is correct and that explains Statement I
- D.Neither Statement II nor Statement III is correct
▶ Answer & Explanation
Correct answer: B. Both Statement I and Statement II are correct, but Statement II does not explain Statement I
Scientific studies indeed indicate subtle shifts in the Earth's rotational axis and speed. These can be influenced by various factors, including mass redistribution on the Earth's surface like melting ice caps. While solar flares impact the Earth's atmosphere and magnetic field, they are not considered a primary driver for the long-term shifts in the Earth's rotation or axis in the way that mass shifts are. The melting of polar ice and subsequent redistribution of water towards the equator is a well-documented phenomenon that directly affects the Earth's moment of inertia, thus influencing its rotation and axis.
Source: UPSC gs1 2025