What caused the thunder?

It thunders because the water vapor in the cumulonimbus cloud generates static electricity when it is constantly moving, which leads to the voltage difference between the cloud and the ground. When the voltage difference is large, it will break through the air, making the air instantly expand and explode, releasing heat and light. Light is lightning, and the loud noise from the expansion explosion is thunder.

Thunder is a discharge phenomenon. When the weather changes greatly, the air will become unstable and prone to strong upward convection, thus forming cumulonimbus clouds. There are a lot of active water vapor in cumulonimbus clouds, which will generate static electricity if it moves up and down continuously.

After static electricity is formed, the upper end of the cloud will accumulate positive charge and the lower end will accumulate negative charge, but the ground is also negative charge. When the voltage difference between the negative charge at the lower end of the cloud and the ground is large, it will break through the air, making the air instantly expand and explode, releasing heat and light. The light emitted is lightning, and the loud noise emitted by the expansion and explosion is thunder.

When it thunders, you must pay attention to safety. It is forbidden to stay at the top of the mountain or on the mountain. You can't hide under a big tree or near a telephone pole. You should also pay attention to the use of home appliances. It is best to turn off the TV, tape recorder, stereo, air conditioner and other electrical appliances indoors.

The principle of thunder is to introduce:

When it rains, some clouds in the sky are positive and some are negative. When two kinds of clouds meet, they will emit lightning, and at the same time release a lot of heat, which will make the surrounding air expand. Instantly heated and expanded air will push the surrounding air and produce strong explosion vibration, which is thunder.

Lightning is a discharge phenomenon in thunderstorm clouds. Thunderstorm clouds generally have two conditions, sufficient water vapor and strong convection. In winter, because the air is cold and dry, the solar radiation is weak, and convection is not easy to form in the air, so lightning is rare. But sometimes when the temperature is high in winter, it will form thunderstorm clouds, leading to lightning and rain and snow. Convection is particularly strong, and it can also form hail, which will produce the weather phenomenon of "thunder in winter". Knowing these reasons, it is not surprising that it thunders in winter.