write the importance of different layers of atmosphere
Answers
Answer:
Earth's atmosphere has five major and several secondary layers. From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
Explanation:
These five different layers provide protection and also make life possible because of the constituent gases which state the significance and importance of atmosphere. The five layers provide a wide range of distribution of gases and the densities of the gases at each layer of the atmosphere.
- Exosphere
The exosphere is the outermost layer of the atmosphere. Its limits reach from around 700 km to 10,000 km from the surface of the earth. There is not much definite boundary between the vacuum of space and the exosphere, as the air gets thinner and thinner moving away from the surface of the Earth. It mostly consists of few particles that move to and from space.
- Thermosphere
It is the layer of the atmosphere ranging from 100 km to 700 km limit of the atmosphere. It begins at the Karman line and is the space where the space shuttles mostly revolve around the Earth. Even though the temperatures are high, the heat is not felt because of the low atmospheric pressure. The International Space Station also orbits around the Earth in this region.
- Mesosphere
This is the densest layer of atmosphere amongst the top three layers. Because of this density, this layer is responsible for the burning of the meteors and other objects falling from space due to the gravitational force of the Earth. Also, there is a temperature drop in this layer with temperatures reaching -110° C. The layer between the mesosphere and the stratosphere known as the mesopause is the coldest place on Earth. It expands from 50 km to 90 km above the earth’s surface.
- Stratosphere
This layer of atmosphere is right above the troposphere and is without any or much of the water vapour. This layer also consists of the ozone layer which is filled with ozone (O3) gas. As is well-known the main function of the ozone layer is to protect the earth from the harmful ultraviolet rays of the Sun. It ranges from 30 to 50 km above the surface of the earth.
- Troposphere
This is the last layer and the closest layer to the surface of the Earth. This layer reaches up to 39 km from the surface of the earth. It is the densest layer and is filled with many different gases. The most abundant gas is Nitrogen which comprises 78% of the component and Oxygen 21% with other gases taking up 0.9% argon and 0.04% carbon dioxide with small traces of other gases.
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