This week I learned about the Earth’s atmosphere. In this essay I’m going to talk about what the atmosphere consists of and the different layers of the atmosphere.
The Earth’s atmosphere consists of 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with small percentages of other elements including water vapor, traces of dust particles, pollen, plant grains, and other solid particles.
Then there are the 5 main layers of the Earth’s atmosphere:
The troposphere – is the lowest level of the Earth’s atmosphere. It contains 80% of the total atmospheric mass and most of the water vapor.
The Stratosphere – is the 2nd layer of the Earth’s atmosphere. This is the ozone layer. This is where airplanes fly through.
The Mesosphere – is the 3rd layer of the Earth’s atmosphere. This area is too high for jet powered aircrafts, but too low for satellites. The average temperature is 120 F.
The Thermosphere – is the 4th layer of the Earth’s atmosphere. The temperature here can rise to 2700 F! This is also where the ISS orbits.
The Exosphere – is the 5th and outer layer of the Earth’s atmosphere. It begins at 700 km above sea level and dissipates into space. The atmospheric pressure is very low in this area; which is also where majority of the satellites orbit here.
Well, that’s the Earth’s atmosphere in one little essay. I hope you enjoyed! Thanks for reading!



