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The atmosphere is mostly made up of Nitrogen (~78%) and Oxygen (~21%) with a little bit of Argon (~1%) - excluding water vapor which ranges from essentially zero up to around 5% depending on local conditions. There are also small amounts of other gases including (but not limited to) carbon dioxide (~0.04%), neon (~0.002%), helium (~0.0005%), methane (~0.0002%), krypton (~0.0001%), and hydrogen (~0.00006%).
The upper atmosphere where the "ozone layer" resides has variable amounts of ozone - around 0.0002-0.0008% (much higher than the lower atmosphere but still minuscule compared to nitrogen, oxygen and argon).
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The atmosphere of the gas giants is usually made up of mostly of hydrogen and?
helium
Is Venus made mostly out of rock and gas?
Venus is made up of an iron core and rocky mantle. While it's atmosphere mostly consists of carbon dioxide and nitrogen.
What is Uranus atmosphere like?
Uranus has a thick atmosphere composed mostly of hydrogen, helium, and methane gases. The upper atmosphere is made up of layers of clouds, while the lower atmosphere is mostly a mix of gases including hydrogen and helium. The atmosphere of Uranus also contains trace amounts of various hydrocarbons.
Do Mars and earth have similar atmosphere?
No, the atmospheres of Mars and Earth are quite different. Earth's atmosphere is mostly composed of nitrogen and oxygen, while Mars has a thin atmosphere primarily made up of carbon dioxide with trace amounts of other gases. Mars also has much lower atmospheric pressure than Earth.
Which planet is thin and is mostly made up of carbon dioxide?
Mars is the only planet that is thin and is made up of only carbon dioxide. :) (Question to asker): Define "thin" at what part of it is made of CO2? But you probably mean the atmosphere so in that case then the answer above is correct... mostly.
