The mesosphere, which is the third innermost layer of the Earth's atmosphere, is comprised largely of nitrogen, oxygen and carbon dioxide. Its chemical composition differs very little from that of the innermost layers of atmosphere, with the approximate composition being 79 percent nitrogen, 20 percent oxygen and 1 percent carbon dioxide and other trace gases. The density of these gases is lower in the mesosphere than in the lower atmosphere.Continue Reading
The mesosphere is found from approximately 31 miles to 53 miles above the Earth's surface. Partially due to the low density of gas molecules here, the temperature often dips as low as -130 degrees F. Temperature decreases further away from the Earth's surface.
Because of the low temperatures and the presence of combustible gases in the mesosphere, meteors slow down when they enter this layer of the atmosphere. Their reaction with the oxygen in the atmosphere leaves behind a fiery trail that is sometimes seen from Earth. Iron and other metal ions are also created as a result of this process, so the mesosphere has a higher ionic content than other atmospheric layers. Occasionally, this causes clouds of ions to form near the poles. These polar mesospheric clouds emit charges in a manner similar to lightning.Learn more about Atmosphere
Dry air is composed primarily of nitrogen, oxygen, argon and carbon dioxide. Nitrogen and oxygen comprise approximately 99 percent of the atmosphere. The other gases are present in minute amounts, each of them equaling less than 1 percent.Full Answer >
The gases that humans breathe in are nitrogen, oxygen, argon and carbon dioxide, with nitrogen in the largest proportion and carbon dioxide in the smallest proportion. The gases that humans breathe out are the same, although more carbon dioxide and less oxygen is present.Full Answer >
The stratosphere is a layer of the atmosphere that consists of nearly 19 percent of the atmosphere's gases, which are nitrogen, oxygen, argon and trace elements like neon and helium. The atmosphere consists of five layers, and its gas composition is 78 percent nitrogen, 21 percent oxygen and 0.9 percent argon.Full Answer >
The two main gases found in Earth's atmosphere are nitrogen and oxygen. Nitrogen makes up 78 percent of the atmosphere, and oxygen makes up 21 percent. The remaining 1 percent consists of other gases, such as argon and water vapor.Full Answer >