Multiple choice

Dense fogs during winter mornings is a common occurrence. This is caused by which of the following?

a. Advection of air b. Surface inversion c. Convection in atmosphere

  1. a only

  2. b only

  3. c only

  4. a and c

  5. b and c
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer. Surface inversion causes fog during winter mornings. The heat of the day is radiated off during the night, and by early morning hours, the earth is cooler than the air above. Smoke and dust particles get collected beneath the inversion layer and spread horizontally to fill the lower strata of the atmosphere. Air drainage causes surface inversion, which causes fog.

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