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2013 · Q14GeographyAstronomy & Earth–Sun Systemeasy

Variations in the length of daytime and night-time from season to season are due to

  1. (a)the earth's rotation on its axis
  2. (b)the earth's revolution round the sun in an elliptical manner
  3. (c)latitudinal position of the place
  4. (d)revolution of the earth on a tilted axis
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Official answer(d) revolution of the earth on a tilted axis

2025 · Q33GeographyAstronomy & Earth–Sun Systemmoderate

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 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?

  1. (a)Both Statement II and Statement III are correct and both of them explain Statement I
  2. (b)Both Statement II and Statement III are correct but only one of them explains Statement I
  3. (c)Only one of the Statements II and III is correct and that explains Statement I
  4. (d)Neither Statement II nor Statement III is correct
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Official answer(b) Both Statement II and Statement III are correct but only one of them explains Statement I

2018 · Q57GeographyAstronomy & Earth–Sun Systemmoderate

Consider the following statements : 1. The Earth’s magnetic field has reversed every few hundred thousand years. 2. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide. 3. When living organisms originated, they modified the early atmosphere of the Earth. Which of the statements given above is/are correct ?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(c) 1 and 3 only