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What is the most abundant gas in the atmosphere?
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Jun 16, 2018 · Learn how the chemical composition of the atmosphere varies with temperature, altitude, and water. Find out which gases are the most abundant near the surface and in the upper atmosphere.
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This table lists the eleven most abundant gases in the lower portion of Earth's atmosphere (up to 25 km). While the percentage of nitrogen and oxygen are fairly stable, the amount of greenhouse gases changes and depends on location. Water vapor is extremely variable. In arid or extremely cold regions, water vapor may be nearly absent. In warm, trop...
It's important to know which gas is most abundant, what the other gases are in the Earth's atmosphere, and how the composition of air changes with altitude and over time for multiple reasons. The information helps us understand and predict the weather. The amount of water vapor in the air is particularly relevant to weather forecasting. The gas com...
Lide, David R. (1996). Handbook of Chemistry and Physics. CRC. Boca Raton, FL.Wallace, John M.; Hobbs, Peter V. (2006). Atmospheric Science: An Introductory Survey(2nd ed.). Elsevier. ISBN 978-0-12-732951-2.Learn why nitrogen accounts for 78% of the mass of dry air and how other gases vary in concentration and importance. Find out how the composition of the atmosphere affects weather, climate, and greenhouse effects.
- Anne Marie Helmenstine, Ph.D.
- Nitrogen (78.1%) While nitrogen is the most abundant gas in Earth’s atmosphere, it only makes up 0.005% of Earth’s crust in weight (David Darling). Nitrogen is incredibly stable and requires a lot of energy to change forms.
- Oxygen (20.9%) Earth has the conditions for life to flourish. Oxygen is essential to human life as our lungs respire oxygen and uses it in metabolism.
- Argon (0.93%) As an inert gas, argon doesn’t bond or do much in the atmosphere. This is why there’s no argon cycle. But we have nitrogen and carbon because of their ability to bond with other elements.
- Carbon Dioxide (0.04%) Carbon is the most important element for building molecules essential for living things. As you can see from the long-term carbon cycle, carbon takes up various forms such as carbon dioxide (CO2), methane (CH4), and glucose (C6H12O6).
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. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
Jun 14, 2019 · Learn about nitrogen, oxygen and argon, the three most abundant gases in the atmosphere, and their roles in life and chemistry. Find out how they are discovered, cycled and used, and what other gases and elements are essential for life.
- Patricia Arnett
About 78% of the atmosphere is nitrogen gas, N2, which is unreactive and just sort of hangs around. About 21% is oxygen, O2, and that’s the stuff we need to breathe in.
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).
