Civil Services Prep

Prelims MCQ · Geography

During the evolution of the atmosphere and hydrosphere, which one of the following best explains a self-reinforcing link between the cooling of the Earth and the formation of oceans?

  1. Water vapour condensed as the Earth cooled; carbon dioxide dissolved in rainwater, causing further cooling and rainfall, and the water collected in depressions.
  2. Solar winds removed hydrogen and helium, while photosynthesis subsequently supplied oxygen to the oceans.
  3. Denser materials sank towards the centre, while lighter materials moved towards the surface and formed the Earth’s layers.
  4. Degassing and volcanic eruptions released water vapour and other gases into the atmosphere.
  1. A geological survey records the following intrusive bodies: Body P is thin and nearly horizontal. Body Q is…
  2. A place has the following characteristics: Its underlying land surface heats rapidly during summer and cools…
  3. A stream on one side of a divide has a steeper gradient and receives more precipitation than a neighbouring…
  4. A survey identifies three plate-boundary settings: At boundary X, normal and reverse magnetic strips parallel…
  5. Although the vertical pressure-gradient force in the lower atmosphere is much greater than the horizontal…
  6. An earthquake releases energy at a point below the Earth’s surface. Which one of the following correctly…