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Post  japeitiatia on Wed Oct 28, 2009 8:18 pm

What are the main gases found in the Earth’s atmosphere and what is the percentage composition?

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Post  bfrsoccer on Wed Oct 28, 2009 8:25 pm

"Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%." Source: http://en.wikipedia.org/wiki/Earth%27s_atmosphere Wink

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