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From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO2 and trace gases. Water vapor is excluded from this total.
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May 13, 2024 · Greenhouse gases, a specific category of trace gases, come from natural and anthropogenic (human-caused) activity. Compared to historical records, the concentration of greenhouse gases is increasing in the atmosphere, causing average global temperatures to rise.
Nitrogen and oxygen are by far the most common gases in our atmosphere. Dry air is composed of about 78% nitrogen (N 2) and about 21% oxygen (O 2). The remaining less than 1% of the atmosphere is a mixture of gases, including argon (Ar) and carbon dioxide (CO 2).
Earth's gravity is strong enough to hold on to the gases in our atmosphere. The few gas molecules that are in the thermosphere are mostly oxygen, nitrogen and helium. Aurora (Northern Lights/Southern Lights)
The first atmosphere, during the Early Earth's Hadean eon, consisted of gases in the solar nebula, primarily hydrogen, and probably simple hydrides such as those now found in the gas giants (Jupiter and Saturn), notably water vapor, methane and ammonia.
Jul 2, 2024 · The atmosphere surrounds the Earth and holds the air we breathe; it protects us from outer space; and holds moisture (clouds), gases, and tiny particles. 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.
Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time.
