Traditional Culture Encyclopedia - Weather forecast - A common saying or proverb about rain

A common saying or proverb about rain

A common saying or proverb about rain:

1, the southerly wind will clear up after a long time.

2. Clouds and clouds are dripping with rain

Sunrise in the morning and rain at night. Dry the dead fish at night.

It was raining at that time.

5. Direct thunderstorm is small, and horizontal thunderstorm is large.

6. It began to rain when it flashed south and north.

7. The moon is holding a red umbrella and it is raining heavily.

The moon is holding a blue umbrella, and the wind is very strong.

9. It will rain within three days after sunset.

10, northwest unlock, see the sun in the afternoon.

1 1. Starlight rain is coming.

Rain is a natural precipitation phenomenon, which is caused by the disturbance of atmospheric circulation. It is an indispensable part of the earth's water cycle and the only way for almost all terrestrial plants far away from rivers to replenish fresh water. Raindrops fall from the sky, big and small, slow and fast. The water on the earth's surface evaporates and rises, and it cools to form rain. Rainwater is the most important fresh water resource in human life.

The water drops falling from the clouds and the water on the land and sea surface evaporate into steam. When the steam rises to a certain height, it becomes small water drops when it is cold. These small water droplets form a cloud, where they collide with each other and merge into large water droplets. When it is too big for the air, it will fall from the clouds and form rain. Rain is the most important fresh water resource in human life, and plants thrive on the moisture of rain and dew. But the flood caused by rainstorm will also bring great disaster to mankind.

The main component of rainwater is water (chemical formula H2O), and a small amount of sulfur dioxide (chemical formula SO2) and nitrogen dioxide (chemical formula NO2). Usually, the PH value of rain is around 5.6, and rain with a PH value less than 5.6 is acid rain. In thunderstorm weather, rain will contain a small amount of ozone molecules (caused by lightning), as well as various impurities and floating dust in the air.