Eventually (long after surface life had died), solar radiation would break atmospheric water into oxygen, which would react with carbon on the Earth to form carbon dioxide. The air would still be too thin to breathe. The lack of atmosphere would chill the Earth’s surface. Plants and land animals would die.

Life on Earth would be impossible in the absence of the atmosphere – the thin layer of gas that envelops our globe, writes William Reville. The remaining 1 per cent is composed of water vapour (variable) and carbon dioxide (0.035 percent) and several other gases. …

What would be the result if Earth’s unique atmosphere did not exist? Earth’s temperature would be more steady and habitable. We would receive less ultraviolet radiation from the Sun. We could expel a lot more toxic gases without any problem.

Earth’s atmosphere is about 300 miles (480 kilometers) thick, but most of it is within 10 miles (16 km) the surface. Air pressure decreases with altitude.

The primitive atmosphere of Earth was devoid of oxygen gas. In primitive atmosphere, hydrogen atoms were most numerous and most reactive.

Usually, the 4 most abundant gases are:

• Nitrogen (N2) – 78.084%
• Oxygen (O2) – 20.9476%
• Argon (Ar) – 0.934%
• Carbon dioxide (CO2) 0.0314%

stratosphere

The Earth’s atmosphere is an extremely thin sheet of air extending from the surface of the Earth to the edge of space. The Earth is a sphere with a roughly 8000 mile diameter; the thickness of the atmosphere is about 60 miles.

Answer. Answer: Along with Earth, Venus and Mars have atmospheres that were primarily formed as a result of volcanic gas emissions, although the evolution of these gases on each planet has been very different.

Originally Answered: What would happen if earth had a thicker atmosphere ? It would be warmer. This is because of the ‘adiabatic lapse rate’ or ‘convective temperature gradient’ in the Troposphere. The temperature would be some 40 degrees Celsius warmer than the regions around it outside of the hole.

If you wanted to fly or swim in an atmosphere, the surest way is to decrease gravity rather than to find a denser gas. We can’t swim in air because we can’t swim in nitrogen/oxygen (they’re not dense enough).

On Earth, water can reside on the surface, lessening the amount in the atmosphere. Carbon sinks: Liquid water and plate tectonics allow Earth to absorb considerable amounts of gas, allowing the atmosphere to be thinned of certain compounds like carbon dioxide.

Spaceflight Now | Breaking News | Greenhouse gases lead to Earth’s atmosphere thinning. The highest layers of the Earth’s atmosphere are cooling and contracting, most likely in response to increasing levels of greenhouse gases, according to a new study by scientists at the Naval Research Laboratory (NRL).

The earth’s atmosphere is gaining mass due to fossil fuel burning. When we burn coal we add extra carbon atoms to the atmosphere in the form of CO2. The net effect of this is to increase the total mass of the atmosphere, resulting in a net increase in atmospheric pressure. …

No, the atmosphere is not becoming thicker. Historical atmospheric pressure is hard to determine, but billions of years ago, it might have been much thicker than it is now, in particular with a lot more greenhouse gases.