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Q81 (CDS-I/2013) Geography › World Physical Geography › Earth rotation and time Answer Verified

Which one among the following statements about the International Date Line is not correct ?

Result
Your answer: —  Â·  Correct: C
Explanation

The International Date Line (IDL) is an imaginary line of demarcation located approximately at the 180° meridian, opposite the Prime Meridian [5]. It serves to separate two consecutive calendar dates, meaning the time difference between places on either side is almost exactly one day [2]. The IDL is primarily situated in the Pacific Ocean to avoid crossing inhabited landmasses, though it zigzags to accommodate political boundaries [5]. Statement 3 is incorrect because the one-day time difference is a consequence of the Earth's rotation (360° in 24 hours) and the necessity of a designated line to reset the calendar during circumnavigation, not the inclination of the Earth's axis [1]. The axial tilt is responsible for seasonal variations, whereas the date change is a functional requirement of longitudinal timekeeping and Earth's rotation from west to east.

Sources

  1. [2] Exploring Society:India and Beyond. Social Science-Class VI . NCERT(Revised ed 2025) > Chapter 1: Locating Places on the Earth > Before we move on ... > p. 24
  2. [5] https://oceanservice.noaa.gov/facts/international-date-line.html
  3. [1] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 2: The Earth's Crust > The International Date Line > p. 14
  4. [4] Exploring Society:India and Beyond. Social Science-Class VI . NCERT(Revised ed 2025) > Chapter 1: Locating Places on the Earth > DON'T MISS OUT > p. 22
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SIMILAR QUESTIONS

NDA-II · 2009 · Q45 Relevance score: 6.21

Consider the following statements: 1. International Date Line is drawn zig-zag to avoid landmass. 2. International Date Line is 180° W as well as 180° E of Greenwich. 3. A ship sailing westward from Greenwich when crossing International Date Line would put back the date by a day. Which of the statements given above is/are correct ?

CAPF · 2025 · Q71 Relevance score: 5.78

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Which of the following is not correctly matched ?

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CDS-I · 2005 · Q1 Relevance score: 3.42

Consider the following statements: 1. The United Nations has declared the year 2005 as the International Year of Physics. 2. The 22nd of April every year is observed as the Earth Day. Which of the statements given above is/are correct ?