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Question

A researcher collects air samples from 90° North latitude and finds a persistent high- pressure system. The underlying process that explains this observation is:

This question was previously asked in
RRB Group D 2025 Question Paper (18-Aug-2026) (Shift 1)
The correct answer is

Sinking of cold, dense air in polar regions

At 90° North latitude, the intense cold causes the air to become dense and sink towards the surface, creating a persistent region of high atmospheric pressure at the pole.

Hence, the sinking of cold, dense air in polar regions explains the observation.

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Important Questions from Pressure

  1. Deep-sea diving vessels have to withstand pressure from the crushing effect of seawater acting-

  2. The pressure increases with-

  3. At high altitudes, the air pressure is _______ than at sea level.
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  5. The atmospheric pressure at sea level is ________, and is taken as the normal atmospheric pressure.

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