What are the indispensable conditions if we want the air in the classroom to form wind?

If you want the air in the classroom to form wind, firstly, the classroom cannot be sealed, if the classroom is sealed, there is no wind to circulate, so the air cannot form wind, and secondly, there must be power, without power, the air in the classroom cannot flow quickly, so power and ventilation conditions are essential for the formation of wind.

I think that in order for the air in the classroom to form wind, it is necessary to form air convection, so that wind can be formed, that is, there must be windows on both sides of the wall in the classroom, so that convection can be formed, so that the wind can be poured in. Most classrooms should seem like they are designed like this, and that was the case when I was in elementary school.

Creates a collision of air currents, that is, a pressure difference in the atmosphere. You can open the window, and if there is a difference in air pressure, it will generate wind, or turn on the fan to generate wind.

If the air in the classroom needs to be windy, at least the air should be able to convection, that is, the windows on both sides should be opened. If you open the window on one side, there will be no place for the wind to go against the cow, so it is better to open it with the window facing it. However, this does not necessarily mean that the wind can be formed, and it must also be under the condition of wind or under the condition of temperature difference to form the wind through the hall, especially in the north-south direction, the window is open, and there will generally be a wind through the hall.

Classrooms should be equipped with air conditioners or fans, right?

I think if we want the air in the classroom to form wind, the essential condition is to have a pressure difference. The flow of air forms the wind, and the flow of air is from a place with high air pressure to a place with low air pressure.

An indispensable condition for the formation of wind is the presence of a pressure gradient --- a pressure difference, and the wind always blows from a place with high air pressure to a place with low air pressure.

There are many ways to form an air pressure gradient, such as blowing air with a fan, such as thermal convection.

A temperature difference is formed. Because the air movement forms the wind. In order to make the air flow, it is necessary to make the temperature of the air different, the hot air rises, the cold air falls, and the wind is formed when it circulates.

Of course, this is to open the window, but also to let the air flow, maybe there must be a fan, otherwise it will not form wind.

The air must be allowed to flow in order to produce a phoenix whirlpool that will be converted into wind energy.

The air causes it to rise, and the flow of this air produces the wind. The wind on the earth is related to the water source, and the wind is produced by the expansion and contraction of water and water vapor. When the accumulated water vapor (cloud) forms water, the volume shrinks, and the surrounding water vapor comes to replenish it, forming wind.

The main thing is to create conditions that allow air to flow, such as opening windows, fans, and air conditioners.

Open the windows to allow the air to circulate freely.

Open the doors and windows, turn on the fans, and the air in the classroom will flow immediately.

Allow the air to form a convection current.

This can be done by opening the window, or by changing the air temperature.

Of course, there must be a difference in the size of the wind!

Open windows to allow air circulation

Under normal circumstances, if you want to make the teacher's air form an atmosphere, the indispensable condition is that the wind is clean and upright, and there must be a few leaders, that is, you must find a few positive people in the class, and then they will lead other people, in this case, it will form a clean air, such a situation, otherwise, it feels very difficult, so this is also a certain challenge for us.

Wind formation is formed by the convection of hot and cold air. Wind can be divided into cold cyclones and hot cyclones. When the critical temperature is on the cold side, a cold cyclone will occur; The opposite is a hot cyclone.

This is something that people can experience through their perceptions. When people encounter a cold cyclone, they feel that the wind is really cold: when people encounter a hot cyclone, they feel that there is a heat wave coming.

The direct cause of the formation of wind is the horizontal pressure gradient force. Wind is affected by different factors such as atmospheric circulation, topography, and water, and has a variety of manifestations, such as monsoon, local sea and land breeze, valley wind, foehn wind, etc. To put it simply, wind is the movement of air molecules.

To understand the causes of wind, we must first clarify two key concepts: air and air pressure. The composition of the air includes:

Nitrogen molecules (78% of the total volume of air), oxygen molecules (about 78% of the total volume of air).

21%), water vapor and other trace components. All the air molecules were moving at a rapid pace, colliding with each other and with anything on the horizon.

Actually, mine is similar to them, but in another way of understanding, you have to understand that the temperature is different in different places, when the air in a place is heated, it will expand and the density will decrease, so it will float up, and the air below will float up and the surrounding air will fill the space, so it will become the wind.

Wind is the most familiar natural phenomenon, and to understand its formation, it is necessary to understand the movement of the atmosphere that surrounds the earth. The flow of the atmosphere, like the flow of water, is from a place of high pressure to a place of low pressure. Solar energy is exactly what creates the difference in atmospheric pressure.

Because of the angle between the Earth's axis of rotation and the axis of revolution around the Sun, the angle of solar irradiation is different for different places on Earth, and this angle also varies for the same place 365 days a year, so the solar radiation energy received by a certain place on Earth is also constantly changing. The Earth's north and south poles receive less solar radiation energy, so the temperature is low and the air pressure is high; Whereas, the equator receives more heat, has a high temperature, and has low air pressure. In addition, as the earth rotates, there are diurnal variations in temperature and air pressure.

In this way, due to the changes in temperature and pressure on the earth's surface, the air flow will move from high pressure to low pressure in order to transport heat from the tropics to the poles, thus forming winds in different directions and accompanied by different meteorological changes. Ocean currents in the ocean play a similar role. On a global scale, the air currents in the atmosphere are a huge energy transport medium, and the rotation of the Earth further promotes the formation of semi-permanent planetary-scale circulation in the atmosphere.

The direction of movement of the wind on Earth.

The topography and landforms of various parts of the earth will also affect the formation of wind, such as the seaside, due to the large heat capacity of seawater, after receiving solar radiation energy, the surface temperature rises slowly, and the land heat capacity is small, and the temperature rises relatively quickly. As a result, during the day, due to the high temperature of the land air, the air rises, forming a sea and land breeze that blows from the sea surface to the land. On the other hand, at night, the sea cools slowly, the air temperature on the sea surface is high, and the air rises, forming a land and sea breeze that blows from the land to the sea.

a) "Valley Wind" during the day; (b) "Mountain breeze" at night

Schematic diagram of valley wind formation.

Simply put, it is the movement of air.

The complex is that hot air rises and cold air falls, creating air convection.

It can also be said that the air rises here and falls elsewhere, resulting in air convection.

Hot air rises and cold air falls. Wind is formed.

The atmospheric pressure is not equal everywhere, and the air moves from the high pressure area to the low area under the action of the atmospheric pressure, thus forming the wind.

The flow of air creates a flow of air, which is the wind.

Everywhere on the earth absorbs the heat of the sun, but due to the unevenness of heating in each part of the ground, the air is not the same degree of cold and warm, so the warm air expands and rises after becoming lighter; The cold air cools and becomes heavier and then falls, so that the cold and warm air flows and forms the wind. In meteorology, wind often refers to the horizontal movement of air and is expressed in terms of wind direction, wind speed (or wind force). Wind direction refers to the direction of the wind, which is generally expressed in 16 directions or 360 degrees.

When expressed in 360 degrees, it is measured clockwise from north. Wind speed refers to the travel of air per unit of time, and is often expressed in meters and seconds, kilometers and miles. In 1805, the Englishman F

Based on the influence of the wind on objects on the ground (or sea), Beaufort has made several modifications to arrive at the wind scale.

The flow of air forms the wind. When the temperature of the two regions is different, the air weight of the two places (as you will learn later, density) is different, the air in the area with high temperature is light (low density) and will rise, and the air in the area with low temperature is heavy (dense) and falls, and this movement forms air convection, and air convection will make the air flow from the area with low temperature to the area with high temperature near the ground, and from the area with high temperature to the area with low temperature at high altitude, this is the wind, and, from the point of view of the formation mechanism of wind, in general, The wind direction at high and low altitude is opposite.

Because of the uneven heat and cold.

A pressure difference is generated... Cold air is dense.

The pressure is strong and the hot air is low in density.

The pressure is small in the same place... Stress will spontaneously move towards equilibrium ... So the wind was formed.

Almost every day of the year, we deal with the wind, from the warm spring breeze to the biting cold. So, do you know how the wind comes from?

If we were to give a simple definition of wind, we would say that the flow of air in the horizontal direction is called wind. Wind is the result of the movement of air from one place to another due to heat or cold.

We know that the sun shines on different areas of the earth's surface, and when the air is exposed to sunlight, it causes the air to be hot in some places and cold in others. The hot air is relatively light, and it is easy to fly high and rise above the cold air around it; Cold air, on the other hand, is heavier and flows to a place with lighter air, so the air flows, and wind is generated.

The difference in pressure in the atmosphere forms the wind.

The wind flows from the area of high pressure to the area of resistance.

Because the pressure is different in the two regions.

It is produced by the movement of air to a place with low air pressure due to the difference in air pressure.

There are two reasons for the formation of wind, namely.

The rotation of the Earth and the difference in how much the Earth's surface is heated by the Sun. The Earth is rotating, which means that a person standing at the Earth's equator moves about 250,000 miles a day. The friction of the Earth's surface against the atmosphere causes the air above the person's head to move as well.

However, since the atmosphere is not permanently connected to the ground, its speed of movement is relatively slow, so it appears to people on the ground as if the air is moving. But due to the presence of the sun, the movement of the wind is more complicated. Where land and sea receive the most solar radiation, the air is warmer and moves upwards and vice versa.

The downward air creates a high-pressure area, and the air in the high-pressure area flows to the low-pressure area, so we see the wind. And that's just the simplest explanation about wind. In fact, the wind we see every day is a very complex phenomenon, and the causes of this are not only the above-mentioned forces, but also the influence of water, mountains, and even buildings and trees.

Wind is formed by air at different temperatures.

Wind is caused by the heat of solar radiation. Sunlight shines on the earth's surface, causing the surface temperature to rise, and the air on the surface of the earth is heated and expands lightly and rises. When the hot air rises, the cold air at a low temperature flows in laterally, and the rising air cools and becomes heavier and falls, and the air heats up to rise due to the high surface temperature, and the flow of this air generates wind.

The sea surface temperature is low, and the air shrinks. It is necessary to replenish the air space on the sea surface by the air and water vapor that expands and rises from the high temperature on the ground. In winter, when the sea surface temperature is high, the sea surface air rises, and the ground temperature is low, and the proportion of air is large to replenish the sea surface space along the ground.

Wind formation is the result of the movement of air. Wind energy utilization is mainly to convert the kinetic energy that the atmosphere has when it moves into other forms of energy.

Wind is the air that moves horizontally, and the movement of the air is mainly due to the different intensities of solar radiation received by the latitudes of the earth. In the equatorial and low latitudes, the solar altitude angle is large, the sunshine time is long, the solar radiation intensity is strong, the ground and atmosphere receive more heat, and the temperature is higher. In higher latitudes, the solar altitude angle is small, the sunshine hours are short, the ground and atmosphere receive less heat, and the temperature is low. This temperature difference between high and low latitudes forms a pressure gradient between north and south, so that the air moves horizontally, and the wind should blow along the horizontal pressure gradient, that is, vertically and isobars blow from high pressure to low pressure.

The earth is rotating, the force that deflects the horizontal movement of air is called the geostrophic deflection force, which causes the air flow in the northern hemisphere to deflect to the right and the southern hemisphere to the right, so the earth's atmospheric movement is affected by the geostrophic deflection in addition to the pressure gradient force. The real motion of the atmosphere is the result of the combined influence of these two forces.

I always remember a simple concept of wind that my elementary school teacher told me: the air that can flow with cold and heat is the formation of wind and wind: air pressure gradient force + floor tile deflection force + friction force.

The air pressure is different due to the different temperatures in different places, and the air in the place with high air pressure blows to the place with low air pressure, and the wind is generated!

Wind is formed by the circulation of air due to the difference in atmospheric pressure caused by heat or cold!

Why does the atmosphere move? What is it that drives it to move? The reasons are intricate. Horizontal winds, vertical updrafts, and irregular turbulent movements all have their own complex causes. Let's start with the causes of wind.

Since the advent of barometers in the 17th century, the fact that air has weight and therefore pressure has provided the key to the mystery of the wind. At the beginning of the 19th century, the first map of the distribution of air pressure and wind was drawn based on the observation data of air pressure and wind in various places. This diagram not only shows the wind blowing from an area of high pressure to an area of low pressure, but also shows that the path of the wind does not blow directly from the area of high pressure to the area of low pressure, but rather an angle that deviates to the right.

For more than 100 years, people have grasped the relationship between air pressure and wind, which is a clue obtained from practice, and further deepened and summed up a relatively complete set of theories about wind. Where does the wind blow? Why is it that sometimes the wind blows so fast and strong, while other times it is lazy and disappears?

This is completely governed by the objective laws of the contradictory movement of the atmosphere, such as the high and low air pressure and the cold and warm temperature. People not only use this law to explain the cause of the wind, but also use these laws to ** the whereabouts of the wind.