Ozone

Around the Earth is surrounded by a layer of atmosphere, also considered "thick blanket". Humanity and life at the bottom of this atmosphere. In such an invisible atmosphere, there are many interesting natural phenomena, ensuring survival for life.

The composition of the atmosphere is very complicated. In addition to oxygen and nitrogen, there are hydrogen, carbonic, helium, neon, argon, kripton, xenon, ozone . Nitrogen accounts for 78.09% and oxygen accounts for 20.95% of the total volume of air, total other gases. remaining less than 1%. In the atmosphere also contains a certain amount of steam and dust. These substances are an important component to form clouds, rain, dew, snow, .

The atmosphere in the atmosphere is not visible but has a huge weight. According to scientists' estimates, covering the whole Earth is an air layer weighing over 500 billion tons. People who live on Earth without the body's outward pressure will be forced to break the flesh and bones. Due to the effect of Earth's gravity, 9 of 10 atmospheric weights are concentrated in the atmosphere near the ground for about 16 km. The farther away from the ground the air becomes thinner.

The thickness of the air is about 2-3,000 km. Because the nature of the air layer at different heights varies widely, meteorologists divide the atmosphere into several layers:

Layers in the atmosphere layer

- The layer closest to the ground is called the troposphere . The average thickness of this layer is at an average latitude of 16-18km. Region 2 pole is 7-10km. The characteristics of the troposphere are that the temperature of the air increases as low as the temperature. The air in the troposphere moves very horizontally and vertically, causing the water to change all three states, causing a series of physical changes. The phenomenon of rain, hail, wind, snow, frost, fog, . all take place in the troposphere.

- From the troposphere to 50km high is the stratosphere . Here the air is thin, water and dust are very small, the air moves horizontally as the main, very stable, so it is suitable for flying aircraft.

- From the stratosphere up to 85km height is the intermediate floor . The air temperature of this floor is even colder, the coldest is -90 degrees C. The top part of the floor has a little steam, or sometimes there are some streaks of silver clouds called luminous clouds.

- Air floor from 85km to 500km is called hot floor . The higher the level of this floor, the hotter it gets. At a height of 400km above the ground, the temperature is about 3,000 - 4,000 degrees C. Oxygen and nitrogen in this level are in ion state, so called the ionosphere. Radio waves emitted from somewhere on the Earth's surface must cross the reflection of the new ionosphere to be transmitted to the rest of the world.

- On the hot floor is the outer floor . The lower limit is about 800-1,000km, the upper limit extends to 3,000km. This is the transitional region between the Earth's atmosphere and the aerospace. Because the air here is very thin, the temperature is very high, some molecules and atoms move at high speed trying to "struggle" to escape the bondage of Earth attraction to space. Therefore this floor is also called the stratum.