In this web page, we will be dividing the atmosphere in several different ways. For example, the atmosphere can be divided into two regions based on chemical composition.
Although there are numerous gases, as shown in Table 6.1, the top four gases make up 99.998 % of the volume of clean dry air (unpolluted air that does not contain water vapor). Of this dry composition of
The atmosphere extends about 500 km above the surface of the planet. In this section, we will explore the layers and the composition of the atmosphere.
From largest to smallest, Earth''s atmosphere composition contains nitrogen, oxygen, argon, CO2 and trace gases. Water vapor is excluded from this total.
The atmosphere is mostly nitrogen (approximately 80%) and oxygen (approximately 20%). The remaining gases are found in much smaller proportions, such as carbon dioxide and water vapour.
In short, the atmosphere is the protective bubble in which we live. This protective bubble consists of several gases (listed in the table below), with the top four making up 99.998% of all gases.
In this web page, we will be dividing the atmosphere in several different ways. For example, the atmosphere can be divided into two regions based on chemical composition.
By mole fraction (i.e., by quantity of molecules), dry air contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other trace gases (see Composition
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