What is dew?

Dew is water droplets that condense near the ground at night or early morning, become small ice crystals, and then melt on objects. There is dew in all seasons, but it is more obvious in autumn.

In spring and autumn, the temperature changes greatly during the day and at night. During the day, the sun heats the earth and the air, and the ground and trees evaporate a lot of water vapor. At night, the earth began to cool down, the fastest cooling is stones and trees, but the heat radiation in the air is slow, and the air is not easy to cool down.

The water vapor in the air comes into contact with the first cooled stone or tree and condenses into small water droplets, which is dew. It's still very cold in the morning, and dew will remain on the grass or stones. ?

Precautions:

It's cool to go out in the morning, but it's scorching at noon and bleak in the autumn wind at night. The temperature is high and low, and it is the easiest to catch a cold. Be sure to take your coat when you go out. There is a big temperature difference between morning and evening in autumn, so we should pay attention to cold and warmth, add and subtract clothes in time, drink more water and eat moist food in dry weather, and pay attention to skin moisturizing to avoid excessive water loss. I prefer to eat rock sugar stewed Sydney in autumn. Tiaolai mutton tou