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Q6 (CDS-I/2015) Geography › World Physical Geography › Earth rotation and time Answer Verified

The Earth without rotational movement would result into 1. no sun-rise and sun-set. 2. no occurrence of day and night cycle. 3. only one season. Select the correct answer using the code given below

Result
Your answer: —  Â·  Correct: B
Explanation

The Earth's rotation on its axis from West to East is the primary cause of the diurnal cycle, including sunrise, sunset, and the regular occurrence of day and night [3]. If rotation ceased, one side of the Earth would perpetually face the Sun while the other remained in darkness, effectively ending the 24-hour day-night cycle and the apparent motion of the Sun across the sky [1]. However, seasons are not caused by rotation; they are the result of the Earth's revolution around the Sun combined with its axial tilt [4]. Even without rotation, the Earth would still revolve around the Sun, and its tilted axis would still cause different hemispheres to receive varying amounts of solar energy throughout the year, maintaining seasonal changes [5]. Therefore, only statements 1 and 2 are correct consequences of a lack of rotation.

Sources

  1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 12: Earth, Moon, and the Sun > 12.1 Rotation of the Earth > p. 172
  2. [2] Science-Class VII . NCERT(Revised ed 2025) > Chapter 12: Earth, Moon, and the Sun > In a Nutshell > p. 184
  3. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 19: The Motions of The Earth and Their Effects > 19.1. Rotation of Earth > p. 251
  4. [4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 19: The Motions of The Earth and Their Effects > Explanation: > p. 267
  5. [5] https://en.wikipedia.org/wiki/Effect_of_Sun_angle_on_climate
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SIMILAR QUESTIONS

NDA-I · 2011 · Q49 Relevance score: -0.17

To a perpendicular to the plane of ecliptic, the Earth’s axis of rotation makes an angle of 23¥2 degrees. Had this angle been 0 degree, which one among the following would result ?

CDS-II · 2010 · Q30 Relevance score: -0.95

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CDS-II · 2014 · Q46 Relevance score: -1.06

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NDA-I · 2019 · Q41 Relevance score: -2.54

Which of the following is/are environmental effects of Rotation of the Earth? 1. Daily or diurnal rhythm in day-light and air temperature 2. Flow path of both air and water are turned consistently in a side-ward direction 3. The movement of the tides Select the correct answer using the code given below: