Why do clouds float Why do clouds flutter in the sky?

Clouds on Earth are multi-degree clouds that refer to the aggregates of water droplets or ice crystal colloids that remain in the atmosphere. Clouds are the tangible result of the vast water cycle on Earth. When the sun shines on the Earth's surface, the water evaporates to form water vapor, and once the water vapor is supersaturated, water molecules collect around the dust (condensation nuclei) in the air, and the resulting water droplets or ice crystals scatter sunlight in all directions, which gives the appearance of clouds.

Because clouds reflect and scatter electromagnetic waves in all bands, clouds are grayscale in color, white when they are thin, but they can appear gray or black when they become too thick or dense for sunlight to pass through. 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 (vaporizes) 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. Clouds on other planets are not necessarily composed of water, such as the sulfuric acid clouds of Venus. Genetic Classification Clouds form in areas where moist air rises and cools.

This can happen in: Frontal clouds, where a warm air mass rises into a cloud. Topographic clouds, when air rises along positive terrain.

Advection clouds, when an air mass passes over a colder underlying surface, such as a cold body of water. Convective clouds, clouds that are produced as a result of the convective movement of air. Cyclonic clouds, clouds created by the rising airflow at the center of a cyclone.

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.

Clouds, which are formed by the condensation of water vapor and dust, are less dense than air, so they float in the sky, and when they condense (become water), they become denser and denser! The air can't bear it, so it falls down and forms rain!

The clouds float in the sky because it is water vapor condensed into water.

Clouds float in the sky because clouds are made up of many water droplets, and the water droplets themselves are moving, so the clouds are also moving; In addition, even if the cloud itself does not move, the wind in the sky will drive it to move. Clouds are water vapor in the atmosphere.

The small water droplets or Xiaoice crystals formed by condensation liquefied in cold are very lightweight. To be precise, a cloud is a mixture of small water droplets formed by the condensation of water vapor and ice crystals, which have a certain density. The atmosphere is made up of gas molecules and floats and sinks.

and other substances, transparent but also have a certain density.

Different classifications of clouds.

1. Low clouds include cumulus clouds and cumulonimbus clouds.

Stratocumulus clouds, Stratus clouds and Nimbostratus are five cloud genera, low clouds are mostly composed of water droplets, and thick or vertically vigorous low clouds are composed of water droplets, supercooled water droplets, and ice crystals. The cloud base height is generally below 2500 meters, but it varies with the season, weather conditions and different geographical latitudes.

2. Mid-clouds are composed of tiny water droplets, supercooled water droplets, or a mixture of ice crystals and snow crystals. The height of the base of the medium cloud is generally between 2500-5000 meters. Altostratus clouds receive more rain in the summer and more snow in the winter. Altocumulus.

There is no precipitation when it is thinner, but in highland areas.

Altocumulus clouds appear rain (snow, flags).

3. In temperate regions, high clouds.

The height of the cloud droplets is usually more than 5 kilometers, mainly composed of ice crystals, and generally does not directly produce precipitation, and in winter the northern cirrostratus and cirrus dense clouds occasionally snowfall, and sometimes snow streaks can be seen.

Snow Banner Diagram.

Because the earth and the atmosphere around the earth in the process of revolution have the effect of geostrophic deflection force, which causes the relative motion between the atmosphere and the earth, so the clouds in the sky will flutter.

When the water vapor rises to the same density of air as it, it no longer rises, and because of the cold, it liquefies or condenses into small water droplets or Xiaoice particles, which appear to be white clouds from the ground.

Because. The gas of the cloud is lighter than the gas at low altitudes.

will float in the air.

When the clouds are thick, they condense into water droplets.

The proportion of the cloud has increased.

It will sink and even fog, rain and snow.

Because there is an atmosphere in the air, water molecules, can be dissolved into gases, for example, the air is humid, it is also invisible, intangible, only when hot and cold air meet, clouds, rain, snow, hail, etc. are formed.

Categories: Education, Science, >> Science & Technology.

Problem description: Clouds are made up of tiny water droplets, water should be heavier than air, why do clouds float in the sky?

Analysis: Air is not a single gas, but a gaseous colloid with complex composition, which is what we often call liquid aerosols. He can be seen as a solvent in which the cloud exists as a colloid.

There are three forms of solutes in solvents: dissolution, colloidal, and precipitate. The specific form of existence depends on the size of the solute particles. The size of the water droplets in the cloud determines that it is a regionally uniform and stable colloid.

In fact, the movement of clouds is not very large, mainly in the form of aggregation and dispersion, and the main reason for floating is that the earth is rotating, so don't you see that the clouds are all floating in one direction.

It is an air mass formed by the condensation of countless water vapors, so it floats.

The reason why the clouds in the sky are drifting: There is a wind in the sky that pushes the clouds forward, so the clouds are drifting.

A cloud is a mixture of water droplets, ice crystals, or water droplets and ice crystals that are suspended in the air and do not touch the ground.

Clouds are the tangible result of the vast water cycle on Earth. When the sun shines on the surface of the earth, it causes the water to evaporate to form water vapor, and once the water vapor in the atmosphere is too saturated, water molecules will collect around the dust in the air, and the resulting water droplets or ice crystals scatter sunlight in all directions, which gives the appearance of clouds.

Clouds form in areas where moist air rises and cools, clouds also have weight, and the weight of a cloud is the weight of the water droplets contained in the cloud. The amount of water droplets will vary depending on the type of cloud.

The fact that such heavy clouds can still hang in the air is mainly due to the action of updrafts. Because the diameter of the small water droplet in the cloud is millimeters, it naturally falls downward at a rate of centimeters per second. In this way, a small updraft can levitate the clouds.

On the one hand, the air has an upward buoyant effect on the cloud droplets, and on the other hand, the cloud droplets are also resisted by the air when they fall. The magnitude of this resistance is proportional to the size of the cloud droplet and proportional to the speed of falling.

When the combined force of these two forces is equal to the gravitational force experienced by the cloud droplet, it falls at a constant velocity. But this falling speed is very small, less than two meters per hour. At the same time, during the falling process, the cloud droplets are warmed by compression, so that the cloud droplets turn into water vapor again due to evaporation.

So, the clouds seen are always suspended in the air.

Because the hot air and water vapor on the ground are always rising, like a big hand, holding the clouds, the clouds cannot fall from the sky.

Why don't the clouds fall" The truth is revealed.

The atmosphere is divided into five layers: troposphere, stratosphere, mesosphere, warm layer, and fugitive layer.

Clouds occur mainly in the troposphere.

We're going to study the troposphere.

In the troposphere, the temperature distribution of the air creates a vertical difference.

The higher the place, the lower the temperature.

Therefore, the air below the troposphere is convected to the top.

This is where the troposphere comes from.

The temperature of the troposphere decreases with altitude, and for every 100 meters of altitude, the temperature drops and we see on the ground that it is only the bottom of the clouds.

Mistakenly, the clouds are piece by piece.

In fact, clouds not only have a large horizontal area, but also have a considerable thickness.

At least 200 meters thick, the highest rainfall clouds, up to 8,000 meters thick, can submerge the world's tallest mountains.

Suppose there is a cloud with a thickness of 200 meters.

Well, the bottom temperature of this cloud is higher than the top temperature.

If the difference in temperature between the top and bottom of the cloud reaches 1,000 degrees Celsius at a cloud thickness of 1,000 meters, then the air at the bottom of the cloud has the power to climb vertically upwards.

It was this upward momentum that held the heavy clouds up in the sky.

Don't underestimate these powers.

It is these forces that hold thousands of tons of clouds in the air.

If the clouds weren't tens of thousands of tons.

So what about the heavy rains that caused flash floods to erupt from.

Perhaps, the weight of thousands of tons is nothing more than a feather compared to the weight of clouds, so don't compare clouds to cotton.

Because, if the clouds pour down instantly, it is enough to collapse the houses inhabited by human beings, and even take people's lives.

We can also see from this troposphere, how great the power of air convection is, let's review, some netizens think that the principle of clouds floating in the sky is the same as the principle of glider gliding, and some netizens also think that the density of clouds is lighter than air.

But now everyone should have a preliminary understanding of the truth of "why clouds float in the air", and summarize this principle with an analogy.

That is: the principle of clouds floating in the air is similar to that of a hot air balloon floating in the air, and the principle of Kong Ming lanterns floating in the sky is also the same.

Why are the celestial bodies in the universe suspended in the air, and what is the force that keeps them from falling?