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The four main layers of the atmosphere are classified according to changes in tempature. The layers are the Troposphere,Stratosphere,Mesosphere,and Thermosphere. We live in the Troposphere, its he inner and lowest layer of Earth's atmosphere. The Troposphere is more variable than the other layers in the atmosphere. The Troposphere is where are weather occurs. The Stratosphere extends from the top of the Troposphere and about 50 kilometers above Earth's surface. The lower part of the Stratosphere is cold, and the upper part is warmer than the lower. The upper Stratosphere contains a layer of ozone. When the ozone absorbs energy from the sun, the energy converts into heat, warming the air. The Mesosphere is the middle layer. the outer Mesosphere tempatures reach too -90 degrees celcius. The Mesosphere protects Earth surface from being hit by most meteoroids. The Thermosphere near its top atmosphere, the air is very thin. The Thermosphere has no definate outer limit. The atmosphere does not end suddenly at the outer edge, Gas atoms and molecules there are so far apart that the air blends with outer space. the Tempature is high. Energy coming from the sun strijes the Thermosphere first. Nitrogen and oxygen molecules convert energy from the sun into heat. So far a review, The four main layers are classified by tempature. Rain, snow,storms, and most clouds occur in the Troposphere. Ozone in the Stratosphere absorbs energy from the sun. Most meteoroids burn up in the Mesosphere producing meteor trails.

1.What does the Mesosphere do for Earth?

2.Where does most of are weather occur?

3.How are the layers classified?

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