Web Analytics
World

How many and what are the layers in the atmosphere?

How many and what layers does the atmosphere have?

A shell of air and gases surrounds our earth. This is also called the atmosphere. It consists primarily of oxygen and nitrogen. We humans and many animals need the oxygen to breathe and to survive.
The atmosphere consists of five layers. Each of these layers has its own characteristics and benefits the earth in different ways.

The troposphere

The first and thinnest layer around our earth is the troposphere. It goes up to 17 kilometers in height. About 85 percent of the total air mass collects here. This allows us humans to breathe and survive. All weather processes also take place in this layer. The higher you go in the troposphere, the colder it gets. Temperatures can reach as low as minus 80 degrees Celsius at the outermost edge of this layer. The temperature decreases by about 6.5 degrees Celsius for every kilometer in altitude.

The stratosphere

The second layer is the stratosphere. It ranges from 16 kilometers to 50 kilometers in height. In this layer it gets warmer again and no longer cold. The ozone layer is also in the stratosphere. This protects us humans on earth from dangerous radiation. It also converts the ultraviolet rays of sunlight into heat. These rays are also known as UV rays. This heat causes temperatures to rise from minus 80 degrees Celsius back down to zero degrees Celsius.

Mesosphere

From 50 to 85 kilometers in height is the mesosphere. Since there is hardly any ozone left in this layer, the temperatures drop again. It can be as low as minus 100 degrees Celsius here. This makes the mesosphere the coldest layer in our atmosphere. In this layer happens what we perceive as shooting stars on earth. When dust particles and smaller rock fragments from space enter the mesosphere, they burn up because of the low temperatures here. Without this braking layer, these chunks would fall to earth.

Thermosphere

The fourth layer of the Earth's atmosphere is the thermosphere. It is located between 85 and 500 kilometers from Earth. Space Shuttles and the International Space Station are located in this layer. It orbits the earth at a height of 350 kilometers. Temperatures in this layer rise to over 1,700 degrees Celsius.

Ionosphere

The ionosphere is part of the mesosphere and the thermosphere. The ion content in this layer is very high, causing radio waves and light to be reflected. We perceive these reflections on Earth in the polar regions as aurora borealis.

Exosphere

The outermost layer of our atmosphere is the exosphere. It starts at an altitude of about 500 kilometers and reaches up to 10,000 kilometers in altitude. This layer does not have a precise boundary, since gravity is weakening here. As a result, at some point gas molecules can no longer be held and flow into space.

Related Posts

assuan staudamm vorteile nachteile 89fa7eb

Aswan High Dam: Advantages & Disadvantages

The Aswan Dam was built on the Nile and has many advantages as well as some disadvantages for the people and the environment along the Nile. We try…

wie heiszligen die bewohner von barcelona ibiza 52f5e32

What are the names of the residents of Barcelona & Ibiza?

Everyone may know that Barcelona and Ibiza belong to Spain. More precisely to Catalonia and thus the inhabitants are also called Catalonian. But how are the inhabitants called…

ein kind politik in china was ist mit zwillingen ab280e9

One Child Policy in China – What About Twins?

For centuries, China's population was extremely low due to wars and natural disasters. Around 1949 the population exploded. Since then, China has had a strict and controversial one-child…

entwicklungslaumlnder schwellenlaumlnder industrielaumlnder leicht erklaumlrt f996db8

Developing countries, emerging countries & industrialized countries easily explained

There are about 194 countries or rather states on earth. These can consist of small islands, such as Palau. And there are so-called giant countries like India or…

drei schluchten staudamm vorteile nachteile 09136f3

Three Gorges Dam: Advantages & Disadvantages

The Three Gorges Dam is the largest hydroelectric power station in the world built and deployed in China. There are some advantages, but at the same time also…

was sind die meist verbreiteten nachnamen in den usa f5bdf8c

What are the most common surnames in the US?

Although the United States, as an immigration nation, has an almost endless range of names and surnames, there are a few that are particularly common. Listed below are…