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Volcanic activity was the primary source of CO2 in the Earth's early atmosphere. During this time, volcanic eruptions released large amounts of gases, including carbon dioxide, into the atmosphere.

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What created earths early atmosphere?

Earth's early atmosphere was created by gases released from volcanic activity, such as water vapor, carbon dioxide, nitrogen, and small amounts of methane. Over time, the atmosphere evolved through processes like photosynthesis by early organisms, which contributed oxygen and transformed the composition of the atmosphere to what it is today.


Which important element was missing in earths early atmosohere?

Oxygen was the important element missing in Earth's early atmosphere. It was only produced later by photosynthetic organisms.


Earths early atmosphere was changed dramatically by the evolution of?

photosynthetic organisms, like cyanobacteria, which produced oxygen as a byproduct of photosynthesis. This led to the increase in atmospheric oxygen levels, changing the composition of Earth's early atmosphere.


What produced oxygen in earths atmosphere?

Oxygen in Earth's atmosphere was produced through the process of photosynthesis by cyanobacteria and early algae, starting around 2.5 billion years ago. These organisms converted carbon dioxide and water into glucose and oxygen using sunlight as an energy source. This oxygen began accumulating in the atmosphere and eventually led to the development of the oxygen-rich atmosphere we have today.


Which group of organisms is most responsible for changing the compisition of earths early atmosphere?

Cyanobacteria are the group of organisms most responsible for changing the composition of Earth's early atmosphere. Through photosynthesis, they released oxygen into the atmosphere, fundamentally altering its composition and paving the way for aerobic organisms to evolve.