atmosphere - it is "air jacket" of the Earth, so it is called, and life on this planet without it would be impossible.Those cosmic worlds where there is no atmosphere, can not boast of living organisms.This "coat" of air weighs 5 billion tons, and from it we take oxygen and plants breathe carbon dioxide.Passing through it neutralized destructive hail from space debris and ozone ball - our salvation from ultraviolet and other radiation.So what is the atmosphere?Let's talk more about it.
atmosphere - a gaseous envelope of a celestial body, star or planet.Constituents of the atmosphere gas is held by gravity, so that is quite difficult to determine where the end of his bed.After all, gas is a formless substance.Therefore, the atmosphere is considered to be the area in which the gas and the planet rotate as a unit.
atmosphere
atmosphere that surrounds our planet, multilayered.It is like an egg, which surrounds the yolk protein.The layers or part of the atmosphere, have different thickness and are at different distances.Let's take a look at them.
troposphere.This is the "weather kitchen".Its thickness is about 15 km.Here, all non-stop moving, warm and cold air flows are mixed, thereby forming clouds, fog, clouds.
Stratosphere.In this layer, the thickness of 25-30 km, in its upper part, ozone accumulates.This gas layer whose thickness is very small, for the earth is vital.But the ozone layer is constantly destroyed due to air entering various unwanted chemicals.
mesosphere.This starts the ball from a height of 50-55 km, it is about 80 km above the ground.At this point, with an increase of the lift amount and the temperature rises.
thermosphere or nanospheres - fathomless expanses of ionized gas.In these places the air under the action of rays from very sparse space has greater conductivity.It is in these high atmospheric layers auroras occur.
chemical composition
Answering a question on what is the atmosphere, it is impossible not to take into account its composition.Thus, it consists of a mixture of 10 different gases, among which the largest amount of nitrogen (78%), followed by oxygen (21%).The remaining 1%, and is the key place is given to argon, a small fraction of the carbon dioxide, neon and helium.Gas atmosphere - it is inert chemicals, in the reaction with other chemical substances, they do not enter.And it is a tiny fraction of the atmosphere falls on sulfur dioxide, carbon dioxide, ammonia, ozone (gas, oxygen related) as well as water vapor.
In addition to these substances, and atomosfere contains foreign matter: particles of smoke, gas contamination, dust, salt and volcanic ash.
Pollution
Along with the question of what the Earth's atmosphere, as relevant and the problem of pollution of our "air jacket".The main sources of pollution are the enterprises of fuel and energy sector, manufacturing, modern transportation.Of all harmful substances occupy 80% of the emissions of sulfur dioxide, hydrocarbons, carbon oxides, nitrogen and solids.Often people do not realize that such an atmosphere, and how important it is for the life of our planet.We've learned that the air just is, and tend to use air envelope as it pleases.
