Why are there clouds in the sky? What is the phenomenon of colored clouds in the sky?

Clouds floating in the sky are made up of many tiny water droplets or ice crystals, and some are made up of small water droplets or Xiaoice crystals mixed together. Sometimes it also contains some large raindrops, ice and snow particles, and the base of the cloud does not touch the ground and has a certain thickness.

Cloud formation is mainly caused by condensation of water vapor.

In this layer of the atmosphere more than ten kilometers from the ground, the closer to the ground, the higher the temperature and the denser the air; The higher you go, the cooler the temperature and the thinner the air.

On the other hand, the water surface of rivers, lakes and seas, as well as the water of soil, animals and plants, evaporates into the air at any time and becomes water vapor. When water vapour enters the atmosphere, it becomes clouds that cause rain, or condenses into frost and dew, and then returns to the ground, seeping into the soil or flowing into rivers, lakes and seas. Later, it evaporates (sublimation) again, and then condenses (condensation) and declines.

The cycle goes on and on.

After the water vapor enters the lower atmosphere from the evaporation surface, the temperature here is high, and the water vapor contained is more, and if this hot and humid air is lifted, the temperature will gradually decrease, and at a certain height, the water vapor in the air will reach saturation. If the air continues to be lifted, excess water vapor will be precipitated. If the temperature there is higher than 0°C, the excess water vapor condenses into small droplets; If the temperature is below 0 °C, the excess water vapor condenses into Xiaoice crystals.

When these small water droplets and Xiaoice crystals gradually increase to the point where the human eye can recognize them, they are clouds.

1. In the sky, leisurely, I really envy its carefree life.

2. The clouds are in the sky, flying freely, and you can go if you want to**.

3. Clouds in the sky, changing magic, turning into animals for a while, and plants for a while.

4. The clouds in the sky are varied. Sometimes it becomes a galloping horse; Sometimes it becomes a bird with wings spread high; Sometimes it turns into a lively bunny.

Anthropomorphic sentences. It is to compare something to the same as people, not to be confused with fairy tales, fairy tales are imagination. According to the imagination, the object is narrated or described as a person, so that it is"things"Have the same words, deeds, demeanor, thoughts and feelings as a human being.

It is important to note that when a figurative word appears in a sentence, the sentence becomes a figurative sentence.

It's not an anthropomorphic sentence anymore.

Benefits: Anthropomorphic sentences can enhance the beauty and expressiveness of language, and make sentences more vivid and vivid. It can also emphasize the affection for this thing.

Caiyun refers to the colorful clouds, which are similar to rainbows and occur in the morning and evening. According to Rayleigh's scattering law, light in the solar spectrum with shorter wavelengths such as violet, blue, and cyan is most easily scattered.

Colors such as red, orange, and yellow, which have longer wavelengths, have a strong ability to transmit light. As a result, we see that the clear sky is always blue, and the light above the horizon is only yellow, orange, and red with longer wavelengths. When these rays are scattered by impurities such as air molecules and water vapor, the sky is lit up in brilliant colors.

1. Clouds jump happily in the sky.

2. The clouds peeked out in the sky.

3. The clouds are smiling in the sky.

4. The clouds hide shyly in the sky.

5. The clouds are dressed up in the sky.

6. The clouds stretched out in the sky.

I believe that everyone should be quite familiar with one of China's four famous novels, "Journey to the West", in the description of "Journey to the West", the gods live in the heavenly palace, where there are fairies, fairy peaches and countless elixirs to yearn for, and the heavenly palace that carries the Jade Emperor is the clouds in the sky.

Back to reality, clouds floating around in the sky are very beautiful, and we often write about clouds in the sky when we were children, because it often changes back and forth into different shapes, so do you know how clouds float in the sky? How heavy are the clouds that can float around in the sky and change shape at will? Let's take a look at it today.

How are clouds formed?

We live in nature, we are dealing with nature all the time, the breathing of people and animals and plants, the oceans, lakes and rivers, etc., are always evaporating water, so there is also water in the air. It's like when we usually turn on the air conditioner and it's cold, there will be small water droplets fogging outside the window, because the water vapor in the air turns into small water droplets when it is cold.

In the daytime, the air temperature rises under the irradiation of the sun, and the density of the air begins to decrease due to the influence of temperature, and then begins to rise, because the air goes up, the lower the air pressure, the more the air expands, and the air will continue to consume its own heat in the process of expansion, so the air will cool down while rising, and the temperature will get lower and lower, and the water vapor in the air will condense into small water droplets like the small example above, and if the temperature of the air temperature is relatively low, the small water droplets will become Xiaoice crystals.

Quick Facts: However, in the sky, due to the pressure of the air, the freezing point of water is different from our usual freezing point, and it is not zero.

Because these small water droplets and Xiaoice crystals gather more and more, the clouds in our sky are formed.

How heavy is the cloud?

The weight of each cloud is different because they are different in shape and size, and different kinds of clouds also weigh differently. Regardless of the cloud, there is only one key factor that determines how heavy the cloud itself is, and how much water it contains. Water above clouds is often made up of small water droplets and Xiaoice crystals.

As long as you know how much water is in the cloud, you can know how heavy the cloud is.

In 1929, the International Meteorological Organization (IMO) divided clouds into ten genera according to their shape, composition, and reasons for their formation based on the classification formulated by the British scientist Luke Howard in 1803. These ten cloud genera can be divided into three cloud families according to their cloud base height: high cloud family, medium cloud family, and low cloud family.

Cirrus. That is to say, there are three cloud families, the high cloud family, the middle cloud family and the low cloud family. Our common cloud is Cirrus in the high cloud family.

The average height of cirrus clouds is more than 6000 meters, and the clouds contain a large number of Xiaoice crystals, Xiaoice which are very small, about millimeters in diameter, and the average density is about grams per cubic meter. It looks very small, but the volume of a cloud can often reach several cubic kilometers, which is very exaggerated, you know, 1 cubic kilometer is equal to 1 billion cubic meters, for example, there is a 3 cubic kilometer cloud, about 600 tons.

Clouds in the sky.

fluttering, dancing.

Move. Float.

Sleep, walk, run, dance, sing, and have assemblies.

The rainbow is the manifestation after the rain, beautiful and colorful, it is the condensation of many water vapors, and it is colorful and gorgeous.

Sleeping, walking, jumping, dancing.

Why are there clouds of all colors in the sky? After knowing the reason, I finally solved my long-standing doubts.

Clouds play a role in the water cycle in the sky. For example, water on the ground evaporates into the air and becomes clouds, which turn into snow in the air and then fall to the ground, forming a process of water circulation on the earth.

Clouds: Usually I look through the trees, sing along the valleys, wander in the fields, pass through the city, rush, play hide-and-seek.

Prepare for rain and shade the rays of outer space.

In your heart, fly freely

What are clouds?

Some people say that the clouds in the sky are the fog on the earth. This is basically true. Clouds are composed of water droplets, ice crystals, and a mixture of both, and their colors are formed by the passing of the sun and moon.

If there are no clouds, there will be no rain. Recently, China's State Environmental Protection Agency (SEPA) announced that "acid rain pollution is on an increasing trend across the country", and American scientists "measured the humidity of clouds at high altitude and found that the proportion of humidity in clouds has increased significantly, and the main component of humidity is nitric acid oxide".This cloud, which has a "greatly increased specific gravity of humidity", is the source of acid rain.

The United States is a highly democratic country with developed industry and transportation, and it is also the first country to experience acid rain and serious acid rain pollution. Due to the flow of polluted atmosphere and the drift of clouds, acid rain has no geographical boundaries and national boundaries, such as Canada's acid rain originating in the United States, and China's Chongqing acid rain will always affect Shanghai in the east. Clouds are made up of water droplets and ice crystals, and everyone knows that the specific gravity of water is 1 (the specific gravity of ice is less than 1).

Scientists have measured that the specific gravity of clouds and ice crystals has increased dramatically because they are no longer "pure water" but have dissolved into various pollutants. "This pollutant is mainly synthesized from the exhaust of large jets, combustibles on the ground, etc," the American scientist said.

This pollutant is chemically reacted to produce nitric acid, sulfuric acid and their salts, all of which have a greater gravity than water, so the specific gravity of the cloud is greatly increased. The increase in the proportion of cloud humidity not only increases acid rain, but may also affect the climate. Experts from the National Oceanic and Atmospheric Administration believe that clouds have an important place in climate change.

The increase in humidity in the clouds causes the clouds to drift up to 15 km above the surface. Clouds can also be seen as diluents, absorbing more light and keeping the planet warm, which may be another factor in global warming.