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Q56 (NDA-II/2014) Geography › World Physical Geography › Ocean circulation systems Answer Verified

Movements of tides are mostly determined by

Result
Your answer: —  Â·  Correct: C
Explanation

The movement and occurrence of tides are primarily determined by the gravitational pull of the moon and sun, combined with the rotation of the Earth. While the moon's gravitational attraction creates tidal bulges on the Earth's surface [2], it is the Earth's rotation that causes specific locations to pass through these bulges, resulting in the periodic rise and fall of sea levels [3]. Centrifugal force, which arises due to the Earth's rotation, acts as a counter-balance to gravity and is a critical factor in generating the second tidal bulge on the side of the Earth opposite the moon [3]. This rotational movement explains why most coastal areas experience two high and two low tides daily [3]. Other factors like wind velocity cause irregular 'surges' rather than regular tides [2], and the albedo effect relates to reflectivity rather than tidal mechanics.

Sources

  1. [1] https://www.nesdis.noaa.gov/about/k-12-education/oceans-coasts/what-causes-tides
  2. [2] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 13: Movements of Ocean Water > TIDES > p. 109
  3. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 32: Ocean Movements Ocean Currents And Tides > 32.2. Tides > p. 500
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SIMILAR QUESTIONS

NDA-I · 2019 · Q41 Relevance score: 2.43

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:

CDS-I · 2015 · Q2 Relevance score: -0.07

Statement I: Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the. rotation of the Earth. Statement II: Earth rotates from the West towards the East once in 24 hours with respect to the Sun.

CDS-I · 2018 · Q16 Relevance score: -0.52

Statement I : Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. Statement I : The Earth rotates from west to east.

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Which one among the following forces is most powerful in determining movement of wind including its velocity ?

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