There is a saying in the countryside that "a rainy mountain wears a hat, but a rainy mountain has no waist".

? Is there a rainy mountain with a hat? It means that when it rains, there is always a cloud on the top of the mountain, just like a mountain with a hat; ? No rain, no waist? Knowing that it is sunny, clouds will gather in the mountainside area, which looks like cutting a mountain.

Yushan wears a hat, Yushan has no waist? This proverb, as a basic law summed up by our ancestors in thousands of years of life practice, is undoubtedly correct. Just like, the ancestors summed it up: when ants move, it will rain heavily; If there are no stars in the sky at night, it will probably rain the next day.

These rules of thumb about weather are correct. Because for the rural economic system that depended on the weather in ancient times, all the livelihood of a year came from the harvest of crops. Moreover, the harvest of crops mostly depends on the weather, so there are so many predecessors who have summed up the detailed weather rules. In order to let more people judge the weather simply and clearly, and carry out farming.

We just introduced it? Yushan wears a hat, Yushan has no waist? The origin of this proverb. Next, let's explain the correctness of this proverb from the perspective of modern science.

First of all, it must be clear that the rain is caused by the accumulation of clouds to a certain extent. Like the steam of boiling water in our daily life, the water left on wet clothes after washing clothes, the water in rivers and lakes and so on. These will be transformed into our clouds through the three-state changes of water (solid, liquid and gas). These will all move upwards and gather in the sky to form clouds.

When the clouds in the sky accumulate to a certain amount, it will rain. Sometimes the accumulated amount becomes our downpour; Sometimes they accumulate less. It became our Mao Mao rain.

So if we see all the clouds on the mountainside moving to the top of the mountain. Then this time means that the number of clouds has reached a certain level and it is going to rain.