Question

What is fog? How is it formed?

Answer 1

Explanation:

Fog forms when the difference between air temperature and dew point is less than 2.5 °C (4.5 °F). Fog begins to form when water vapor condenses into tiny liquid water droplets that are suspended in the air. ... This occurs from either added moisture in the air, or falling ambient air temperature.

Answer 2

Explanation: When water droplets or ice crystals  are suspended in air due to condensation in a visible state,this state is known as fog.