Consider the following statements regarding the rotation of the Earth

Consider the following statements regarding the rotation of the Earth :

Since the Earth rotates by 15° each hour, time zones normally differ by one hour
At the International Date Line, the calendar day changes – advancing a day for eastward travel, dropping back a day for westward travel
Daylight saving time advances the clock by one hour
The Moon rotates and revolves about the Earth in the same direction that the Earth revolves around the Sun

Which of the statements given above is/are correct ?

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1 only

3 and 4 only

1, 3 and 4

2, 3 and 4

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CAPF – 2024

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Statements 1, 3, and 4 are correct. Statement 2 is incorrect.

The Earth rotates approximately 15 degrees of longitude per hour, which is the basis for standard time zones. Daylight Saving Time involves advancing clocks, typically by one hour. The Moon orbits and rotates in the same direction as Earth orbits the Sun (counter-clockwise when viewed from above the North Pole). The International Date Line works such that crossing it from west to east causes the date to go back a day, while crossing from east to west causes the date to advance a day.

Standard time zones are nominally 15 degrees wide, corresponding to one hour difference, although political boundaries often cause deviations. The International Date Line is located roughly along the 180° longitude. The synchronous rotation of the Moon (rotating and revolving at the same rate and direction) is why the same side of the Moon always faces Earth.

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