https://padlet.com/200712519/99kxngatbg9b no description en-us 2019-03-20 04:29:28 UTC 2024-12-14 18:06:23 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Hearts.png 200712519 https://padlet.com/200712519/99kxngatbg9b/wish/343169590 2019-03-20 04:31:24 UTC https://padlet.com/200712519/99kxngatbg9b/wish/343169590 200712519 https://padlet.com/200712519/99kxngatbg9b/wish/343171968  By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere. ]]> 2019-03-20 04:54:06 UTC https://padlet.com/200712519/99kxngatbg9b/wish/343171968 200712519 https://padlet.com/200712519/99kxngatbg9b/wish/343171982  The atmosphere has a mass of about 5.15×10¹⁸ kg ]]> 2019-03-20 04:54:17 UTC https://padlet.com/200712519/99kxngatbg9b/wish/343171982 200712519 https://padlet.com/200712519/99kxngatbg9b/wish/343172000  three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The atmosphere becomes thinner and thinner with increasing altitude, with no definite boundary between the atmosphere and outer space]]> 2019-03-20 04:54:28 UTC https://padlet.com/200712519/99kxngatbg9b/wish/343172000 200712519 https://padlet.com/200712519/99kxngatbg9b/wish/343172194 Dry air contains 78.09% nitrogen, 20.95% oxygen 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapour, on average around 1% at sea level, and 0.4% over the entire atmosphere.]]> 2019-03-20 04:56:40 UTC https://padlet.com/200712519/99kxngatbg9b/wish/343172194