Multiple choice

What is the relative humidity of fog?

  1. 100%

  2. 98%

  3. 90%

  4. 50%

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fog is a cloud that forms at ground level when water vapor condenses into tiny liquid droplets. This condensation occurs when the air is fully saturated, which means the relative humidity is 100%.