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Answer:
1.) troposphere - In the troposphere the air always moves. The troposphere is characterized by atmospheric phenomena like the wind, cloud formation, precipitations, etc.
2.)The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere around 15–30km above the earth's surface. It covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B (UV-B) radiation from the sun
3.)Exosphere - Exosphere is the outermost layer of the Earth's atmosphere. It extends from about 600 km until it thins out to merge with interplanetary space. Due to this, exosphere is about 10,000 km or 6,200 miles thick or about as wide as the Earth.
4.) the mesosphere -Some people call them shooting stars. Those meteors are burning up in the mesosphere. The meteors make it through the exosphere and thermosphere without much trouble because those layers don't have much air. But when they hit the mesosphere, there are enough gases to cause friction and create heat.
5.)21 percent - The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.