Hey there, intrepid researcher Rk Naresh! Kosh here, ready to dive into the fascinating world of our atmosphere.

So, the atmosphere, my friend Rk Naresh, is a magnificent cocktail of gases that envelops our planet. Here are some key characteristics:

1. **Composition:** The primary components are nitrogen (about 78%), oxygen (around 21%), argon, and trace amounts of other gases like carbon dioxide, neon, helium, and more.

2. **Layers:** The atmosphere is divided into several layers, including the troposphere (where weather occurs), stratosphere (home of the ozone layer), mesosphere, thermosphere, and exosphere.

3. **Pressure and Density:** Atmospheric pressure and density decrease with altitude. The air gets thinner the higher you go.

4. **Temperature:** Generally, temperature decreases with altitude in the troposphere and then increases in the stratosphere due to the absorption of ultraviolet (UV) radiation by the ozone layer.

Now, about that ozone layer! It's like Earth's superhero cape. The ozone layer is primarily found in the stratosphere, and it absorbs the majority of the sun's harmful ultraviolet (UV) radiation. Specifically, it absorbs UV-B and UV-C rays, letting only a small portion of UV-A and visible light reach the Earth's surface.

This unique ability to absorb harmful UV radiation is crucial for protecting life on Earth, including us curious researchers. So, in a nutshell, the ozone layer acts as a natural sunscreen for the planet, shielding us from the Sun's more aggressive rays.

Feel free to ask if you Rk Naresh want to explore more atmospheric wonders or if you Rk Naresh have other burning questions!

Dr Kaushik Shandilya thank you for your contribution to the discussion

The atmosphere is a blanket of gases that surrounds the Earth. It is made up of about 78% nitrogen, 21% oxygen, and 1% argon, with small amounts of other gases, such as carbon dioxide, neon, and helium. The atmosphere protects life on Earth from harmful radiation from the sun, helps to regulate the Earth's temperature, and provides the oxygen that we breathe.

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nitrogen gas

The atmosphere is divided into five layers:

• Troposphere: The lowest layer, where we live and breathe. It is about 10 kilometers (6 miles) thick.📷Opens in a new window📷learnweather.comtroposphere
• Stratosphere: The layer where the ozone layer is found. It is about 50 kilometers (31 miles) thick.📷Opens in a new window📷scied.ucar.edustratosphere
• Mesosphere: The layer where the temperature starts to decrease with altitude. It is about 85 kilometers (53 miles) thick.📷Opens in a new window📷scied.ucar.edumesosphere
• Thermosphere: The layer where the temperature starts to increase with altitude. It is about 500 kilometers (311 miles) thick.📷Opens in a new window📷spaceplace.nasa.govthermosphere
• Exosphere: The outermost layer, where the atmosphere gradually fades into space. It is about 10,000 kilometers (6,214 miles) thick.📷Opens in a new window📷earthhow.comexosphere

The ozone layer is a region of the stratosphere that contains a high concentration of ozone (O3). Ozone is a molecule made up of three oxygen atoms. It is a very important part of the atmosphere because it absorbs most of the sun's ultraviolet (UV) radiation. UV radiation can be harmful to life on Earth, causing skin cancer, cataracts, and other problems.

ozone layer

The ozone layer is being depleted by human-made chemicals, such as chlorofluorocarbons (CFCs). CFCs were once widely used in refrigerants, aerosol propellants, and foam-blowing agents. However, they are now banned in most countries because they are known to destroy ozone.

The depletion of the ozone layer is a serious problem because it allows more UV radiation to reach the Earth's surface. This can lead to an increase in skin cancer, cataracts, and other health problems. It can also damage plants and ecosystems.

Dr Murtadha Shukur thank you for your contribution to the discussion

Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. These gases are found in atmospheric layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure. The percentage of nitrogen, oxygen, argon, carbon dioxide, and other gases is 78%, 21%, 0.9%, 0.04%, and 0.1%, respectively. The five layers of the atmosphere are troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The troposphere is the stratum of the atmosphere where living beings exist. Based on temperature changes, the Earth's atmosphere is divided into four layers. These layers are the troposphere, stratosphere, meso sphere, and thermosphere. Although these words might sound complicated, the name of each layer gives you clues about its features. The sun produces UV, which is commonly split into three bands: UVA, UVB, and UVC. UVA is not absorbed by ozone. UVB is mostly absorbed by ozone, although some reaches the Earth. UVC is completely absorbed by ozone and normal oxygen. Ozone is extremely valuable since it absorbs a range of ultraviolet energy. When an ozone molecule absorbs even low-energy ultraviolet radiation, it splits into an ordinary oxygen molecule and a free oxygen atom. The earth's atmosphere absorbs the majority of ultraviolet, X-, and gamma rays, which are all shorter wavelengths than visible light. High energy X- and gamma rays would damage organisms and cells of creatures if they were to reach the earth's surface directly. The ozone layer in the stratosphere absorbs a portion of the radiation from the sun, preventing it from reaching the planet's surface. Most importantly, it absorbs the portion of UV light called UVB. UVB is a kind of ultraviolet light from the sun that has several harmful effects. Just as visible light consists of different colours that become apparent in a rainbow, the UV radiation spectrum is divided into three regions called UVA, UVB and UVC. As sunlight passes through the atmosphere, all UVC and most UVB is absorbed by ozone, water vapour, oxygen and carbon dioxide.