Traditional Culture Encyclopedia - Weather forecast - Due to the decline of air quality, there are more and more foggy weather in some areas, which has a great impact on local traffic. Fog is the meeting of water vapor in the air.

Due to the decline of air quality, there are more and more foggy weather in some areas, which has a great impact on local traffic. Fog is the meeting of water vapor in the air.

(1) Fog is a small water droplet in which water vapor in the air is liquefied into liquid when it is cold.

(2) Seeing the fog all over the sky is because the light reflected by the fog enters the eyes;

So the answer is: (1) liquefaction; (2) reflection.