File:Atmosphere Composition Hand Mnemonic.png
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English: This diagram is a mnemonic for teaching students that, by volume, the Earth's atmosphere is composed basically of 4 parts nitrogen and 1 part oxygen. The more precise composition for dry atmosphere is 78.1% nitrogen, 20.9% oxygen, with the other 1% being mostly argon (depicted in blue) along with carbon dioxide and other trace elements (purple). Not depicted is another important component of the atmosphere: water vapor (H2O), and its proportion varies considerably though it averages roughly 1% in the troposphere. With each of the five fingers representing roughly 20% and the finger tips roughly 1%, the nitrogen can be seen as: 80% minus ~2% = 78.1%. The oxygen is 20% plus ~1% = 20.9%. The argon is ~1%. Carbon dioxide and the other trace gases are a small fraction of 1%. A table of the exact composition is listed here. And a pie chart representation is also available:  File:Atmosphere gas proportions.svg |
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| Author | Tdadamemd |
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:02, 29 November 2013 | | 1,170 × 1,950 (135 KB) | Tdadamemd (talk | contribs) | Now being exacting, to show that with each finger representing ~20%, N2 is almost 2% short of 80% and O2 is almost 1% greater than 20%. Argon is almost 1%, with CO2 etc making up the remainder of trace gases. |
| 08:09, 29 November 2013 |  | 1,170 × 1,950 (174 KB) | Tdadamemd (talk | contribs) | Modified to depict Argon along with CO2 and other trace gases. | |
| 10:39, 22 December 2012 |  | 1,234 × 2,100 (127 KB) | Tdadamemd (talk | contribs) | User created page with UploadWizard |
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