Air and cloud vaper
peroxide and hydrogen.
The Earth's Moon has an extremely thin atmosphere known as an exosphere. It is composed mostly of helium, neon, and hydrogen. The low gravity and lack of a magnetic field on the Moon allow its atmosphere to be easily swept away by the solar wind.
Planet Earth - about 80%.
Igneous rock.
If Earth did not have any life, its atmosphere would likely consist mostly of nitrogen, similar to the atmosphere of Mars or Venus. Volcanic activity would have likely contributed to the release of gases like carbon dioxide and water vapor. Sunlight and cosmic rays might also have influenced the composition of the atmosphere over time.
No. Earth's atmosphere is a mixture, mostly comprised of nitrogen and oxygen.
Neptune (NovaNet) There's something wrong here. Neptune is mainly a hydrogen atmosphere. Earth is the planet with a mainly nitrogen atmosphere, but the coldest is Neptune.
air
No, Earth's atmosphere is mostly composed of nitrogen (about 78%) and oxygen (about 21%). Hydrogen makes up a very small fraction of Earth's atmosphere, less than 0.1%.
venus and earth.
Nitrogen
The atmosphere of Mars is much less dense than that of Earth and is composed almost entirely of carbon dioxide. Earth's atmosphere is mostly nitrogen and oxygen.