Why do clouds float in the air, and why do clouds float in the air?

It is the warm, humid updrafts that form the clouds that are able to float in the air. The water content of an ordinary cloud is about the weight of 200 adult bull elephants combined. However, the water in the clouds is broken down into tiny droplets and ice crystals, so they do not pour down.

Even the largest droplets have a radius of only millimeters. If a droplet of this size wants to fall to the ground, it needs to face strong air resistance, and its maximum speed of descent can only reach 30 cm s, and for the floating clouds, the downward gravity is balanced by the upward force of the updraft. Rainfall is only formed when many water droplets combine and are large enough.

And how much updraft does it take to keep the clouds floating in the air? It depends on the type of cloud. Straight, broad stratiform clouds are formed and supported by weak air currents that rise a few centimeters per second.

Cumulonimbus clouds, which form heavy rains and storms, contain large water droplets that require updrafts of up to several meters per second to support them.

I think it's the low density of water molecules, which causes water molecules to provide their own buoyancy during volatilization. So upward, as for the upward force of the thermal, there may also be there. But the most important thing is that it has a small molecular weight of its own (18), which is less than the average molecular weight of air (29).

Just as hydrogen goes up, carbon dioxide goes down. After rising, the volume becomes larger, and the work is done externally, and the heat is released, so the water vapor cools. It then reacts with the condensation nucleus and becomes a droplet-shaped.

Therefore, it is inferred that the interior of the cloud is a process that goes back and forth. Someone upstairs will study the mechanism. I don't have time to do it.

If it works, maybe it's a science, and when the time comes, just remember to hang my name. Ha ha.

Before the rain formed, it was just water vapor, and the density was very small, so it could only be carried by the wind!

The overall density of clouds is smaller than that of air.

Maybe it's the hot air down there.

The crown is right, to add, there is a lack of condensation nuclei at high altitude, so the water droplets are not easy to condense, and if there is an airplane passing by, the dust in the exhaust will quickly condense the water vapor, so you will see the tail behind the plane.

It's small droplets of water floating in the air.

Electrified by friction, they repel each other.

Clouds are actually formed by the accumulation of water vapor. Clouds have a high oxygen content in them, so they are lighter than the atmosphere. So it floated in the air.

The water in the rivers, lakes and seas was roasted and evaporated by the sun, but it did not disappear, but floated up like water boiling in a pot. Gather in the air and form clouds. When the cold air is encountered, the clouds condense into raindrops and fall.

The water flows low, and finally goes to the rivers, lakes and seas. It's a cycle.

Cloud both. Water vapour.

Although water is denser than air, it does not float.

But after the water is evaporated into water vapor, the water vapor is required.

Compare. The density of the air is much smaller, so it will be in the air.

Buoyancy. but the denser the air, thinner, and colder it gets.

So when the water vapor rises to the same density of the air as it, it is no more.

rises and also liquefies or condenses into small water droplets or Xiaoice particles from the ground because of cold.

It seems to have become one by one.

As soon as the sun goes down, the heat begins to emit into the air, approaching the temperature of the air on the ground.

Also as it decreases, the better the weather, the fewer clouds in the sky, and the heat on the ground is not hindered in any way, and the faster it is dissipated.

Introduction: In fact, the clouds that people observe in their daily lives are not like marshmallows.

It's the same thing, but it's made up of water, but in everyday life, people feel that water is heavier than air. So why is it that clouds can float in the air, but the water in lakes can't be eliminated in the air?

In fact, air is also dense, and air is a mixture of various gases, for example, air contains oxygen and carbon dioxide.

It also contains some noble gases.

Therefore, the air also has a certain density. The concept of floating in people's daily lives does not require a special substance, it only needs to be able to float at a lower average density than another. For example, although clouds are essentially water, this is not water like rivers and lakes, but water vapor.

Taken together, the average density of the clouds formed by this water is lower than that of the air, so the air provides a certain amount of buoyancy. In this case, the clouds can float in the air, and the water can float in the air. The fact that a ship is also very heavy and can still float in the water is also related to the average density.

Therefore, as long as the buoyancy is greater than its own gravity, then it is fine, and people have also used this principle to build airboats.

In fact, the most important thing for human beings is to maintain the body temperature of the surface and the role of rainfall, although there is water in the clouds, but when this water becomes rain requires specific conditions. In general, with the change of seasons and the alternation of hot and cold air, large-scale precipitation will occur, and the climate change will vary from region to region. But beware, with global warming.

As well as the emergence of various weather, places that were not prone to precipitation before have more precipitation. This also shows that there are some anomalies in the location of the warm current and the cold air, as well as the confluence location, so it is important to pay attention to the change in climate.

Because the pressure in the sky is relatively large, the water will exist in the air in other ways, and when it cools, the water will change in solidity, so it will fall.

Because clouds are made up of small water droplets, they have a very low density, so they float in the air.

Because clouds are less dense than air, they can float into the air.

Reason: The cloud is 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 air will drive it to move;

Even if there is no wind, we are on the earth, with the earth as the relative stationary, and the clouds are high in the sky, and there is a relative motion relationship with the earth, which is also a relative motion relationship with us, and we see that the clouds are also floating when we see them. In short, the clouds just flutter in the sky.

Clouds are formed when air containing water vapor rises, and due to the flow of air, water vapor is produced, so that white clouds are called.

Clouds are small water droplets in the air that are large and tall, so they look white and form clouds because they are far away from us and are located relatively high. If it were on land, it would not be called a cloud, but a fog.

This has to do with the cause of clouds.

Cloud formation is mainly caused by condensation of water vapor.

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 the 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 is higher than 0°C, the excess water vapor will condense 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.

When you see the above, you should know that the cloud is the continuous rise of water vapor, which is first hot and then cold, causing part of the water vapor to saturate and precipitate, which is the cloud we see. So we can only see clouds at high altitudes, that is, we feel that the clouds are floating in the air, and the water vapor cannot be seen by Qiao Bu Xian before it precipitates, so we can't see the clouds at low altitudes.