How did you say it rained in ancient times?

Rain is a natural landscape, but the water on the earth is turned into steam and evaporated into the air after being irradiated by sunlight.

Water vapor condenses into small water droplets when it meets cold air at high altitude. These small water droplets are very small, with a diameter of only 0.0 1 ~ 0.02 mm and a maximum of only 0.2 mm ... They are small and light, and are held up in the air by the updraft in the air.

It is these small water droplets that gather in the air to form clouds. These small water droplets will become raindrops and fall to the ground, and the volume will increase by about 1 10,000 times.

Extended data:

Rain can be topographic precipitation caused by the movement of airflow and clouds and the influence of topography, seasonal rainfall caused by clouds and fronts, heavy rain caused by natural disasters such as typhoons, hurricanes and tornadoes, and special rainfall such as Meiyu.

Rainwater has a great influence on human life, such as daily water consumption, crop growth, reservoir storage, fishery and aquaculture, transportation and so on. And it will also affect the animal and plant ecology and land types in a specific area. Too much or too little rainfall will have a negative impact on the local area.

In order to cope with the mobility inconvenience caused by rainfall, human beings invented umbrellas, raincoats, rain boots and other rain gear with their own technology, and even reminded people of the recent rainfall probability by developing weather forecasting technology and system.