How are wind, rain, thunder and lightning formed? What are the forms of wind and rain? Tell me okay.

1. Wind. The difference in air pressure and the rotation of the earth causes the air to move and generate wind. The weight of the air causes the air pressure, and the air pressure in different areas varies according to the air density, topography, temperature, latitude and longitude, so the high and low air pressure is generated, and the air flow moves from high pressure to low pressure on the same horizontal plane, which forms wind.

2. Rain. The water on the surface of the land and sea evaporates into water vapor, and the water vapor rises to a certain height and becomes small water droplets when it is cold, and these small water droplets form clouds, which collide with each other in the clouds and merge into large water droplets, and when it is too large for the air to support, it falls from the clouds and forms rain.

3. Thunder and lightning. When the amount of electric charge reaches a certain level, which is equivalent to the voltage between clouds or between clouds and the earth, it will cause discharge because the local electric field strength reaches or exceeds the electrical breakdown strength of the air under the current conditions.

The electric power in the air is rapidly heated and expanded by the action of electric discharge, and is compressed into plasma due to the expansion, which in turn produces the special component of lightning (the sound of shock waves).

Wind, rain, thunder and lightning are the causes of the formation: wind: due to the difference in latitude and longitude, the sun irradiates the uneven distribution of heat on the surface, so that air movement occurs, and the wind is formed.

Rain: Evaporated water vapor accumulates in the liquefied air to form condensation nuclei, which gradually increase and form rain fall when it reaches a certain point. Thunderbolt:

When the voltage reaches the point where it can pass through the air, the two adjacent clouds will be discharged, resulting in electric sparks and loud noises.

As for the cause of wind, it is generally explained that the sun heats the ground and causes the air to heat the convection; Then there is the expansion of the gas with high temperature, the density is small, and the gas with low temperature shrinks, and the density is large, so that there will be a horizontal pressure gradient force between the cold air and the warm air, and under the action of the horizontal pressure gradient force, the cold air with high air pressure will flow to the warm air with low air pressure, so the wind is formed. As for the cause of lightning, the existing theory is that the positive and negative charges in the cloud are constantly separated due to a certain "electrification mechanism", and when the electric field in the center of the positive and negative charges reaches a certain strength, it breaks through the air to produce lightning and vibrates the air to form thunder.

Wind is a natural phenomenon caused by the movement of air, and it 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.

Rain is a natural precipitation phenomenon produced by disturbances in the atmospheric cycle, an indispensable part of the Earth's water cycle, and the only way for almost all terrestrial plants far from rivers to replenish fresh water. Raindrops fell from the sky, big and small, fast and slow. Water evaporates on the earth's surface, rises and cools to form rain.

Rain is the most important source of freshwater resources for human life.

Thunder is caused by the friction of positive and negative charges between clouds and clouds in the atmosphere to produce violent discharge, produce high temperatures, make the atmosphere expand sharply, and produce a deafening loud sound, which is lightning and thunder. When atmospheric charges are constantly accumulating in the clouds. If the amount of charge becomes strong enough, lightning will occur.

When lightning crosses the sky, it can quickly warm up the air along its path. The heated air expands rapidly and rushes in all directions as violently as it happens. This causes a huge sound wave.

Lightning is a phenomenon of intense electrical discharge between clouds, between clouds and ground, or between parts of the cloud body (usually in cumulonimbus clouds).

Usually storm clouds (cumulonimbus clouds) produce electric charges, with yin electricity at the bottom and yang electricity at the top, and also a positive charge on the ground, which follows the clouds like a shadow. Positive and negative charges attract each other, but air is not a good conductor. Positive charges run toward trees, hills, the tops of tall buildings, and even on top of the human body, in an attempt to meet negatively charged clouds; The negatively charged branch-like antennae extend downwards and get closer to the ground as they go downward.

Finally, the positive and negative charges finally overcome the air barrier and connect. A huge electric current surged from the ground to the clouds along a conductive airway, producing a bright and dazzling flash.

Formation of rain.

Formation of thunder. Formation of electricity Any two objects rubbing against each other can generate electricity. In the mid-18th century, the American scientist Benjamin Franklin analyzed and researched that there are two kinds of electricity with different properties, called positive electricity and negative electricity. The electricity carried by an object due to friction is either positive or negative.

Scientifically stipulated: the same electricity as the glass rod rubbed with silk is called positive electricity; The same electricity as a rubber rod that has been rubbed with fur is called negative electricity.

Friction electrification is just a phenomenon. Modern science tells us that any object is made up of atoms, and atoms are composed of positively charged nuclei and negatively charged electrons, and electrons move around the nucleus.

Under normal circumstances, the number of positive charges in the nucleus band is equal to the number of negative charges in the electron band outside the nucleus, and the atom is not electrically charged, so the whole object is neutral. It is difficult to change the number of positive charges in the nucleus, but the electrons outside the nucleus can get rid of the nucleus and transfer to another object, so that the number of negative charges in the electron belt outside the nucleus changes. When an object loses electrons, the total number of negative charges in its electron band is less than the positive charge of the nucleus, showing that it is still positively charged; On the contrary, an object that would otherwise be neutral, when it gets electrons, it shows being negatively charged.

When two objects rub against each other, one of them must lose some electrons and the other gets the extra electrons. For example, if the glass rod is rubbed with silk, some of the electrons of the glass rod are transferred to the silk, and the glass is positively charged due to the loss of electrons, and the silk is equinegatively charged due to the electrons obtained. Rub the rubber rod against the fur, some of the electrons of the fur are transferred to the rubber rod, the fur belt is positively charged, and the rubber rod carries the same amount of negative electricity.

The cause of friction of the same material.

By rubbing against each other with some of the same materials that are easy to generate electricity, the two friction surfaces can be electrified. Further experiments show that the charges on the two surfaces are homogeneous, and some materials can have a positive charge after friction, and some can have a negative charge after friction.

After excluding external influences (e.g., conduction of charges by other conductors), the same results can still be obtained.

This phenomenon is explained by taking into account the contamination of the surface of the medium.

Because the medium is contaminated to a certain extent in the surrounding environment before it is rubbed, the result of the contamination is the formation of an electric layer due to contact between the medium and the contaminant. Friction will cause a part of the pollution to be separated from the surface of the medium, so that the electric layer between the part of the medium and the pollution will also be separated, so that the medium will be charged. Because the medium is the same, and the pollutants are also the same, the electric layer is also the same, so when the electric layer is separated, the medium has the same charge.

Different objects have different abilities to confine electrons, so when they come into contact with each other, electrons are transferred, so that the two objects carry an equal amount of xenogeneous electric nuclei.

Wind – The expansion or contraction of air due to the movement of various substances, gravity in order to balance the air pressure, causes the air in one area to advance towards another, and if you are on the propulsion route of air propulsion, you can feel the wind.

Rain - composed of many small water droplets in the air, if there is not much water vapor, it can float in the air, forming all kinds of clouds, if there are too many water droplets, its weight enters the range of the earth's gravity, it will cause a large number of small water droplets to fall, hundreds of small water droplets combined into a drop of rain.

Thunder and lightning - by the collision with other substances (air, positive and negative charges, etc.) during the expansion and stretching of a huge cumulonimbus cloud, causing it to produce an electric charge, and the thunder is a sound, which is a dull sound made by the violent friction with the air due to the speed of lightning being too fast.