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Laurie Hammes

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3y ago

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What does gas do to some scientist think was missing from earths early atmosphere?

oxygen


How was oxygen added to the earths atmosphere?

Oxygen was added to Earth's atmosphere through the process of photosynthesis by early photosynthetic organisms like cyanobacteria. These organisms released oxygen as a byproduct, which accumulated over millions of years and eventually led to the oxygen-rich atmosphere we have today.


How much of the earths atmosphere is made up of nitrogen and oxygen?

The earths atmosphere is made up of 78% nitrogen and 21% oxygen


Where did the gases in the earths atmosphere come from?

Scientist theorize that bacteria with chlorophyll in them slowly but surely began to multiply. And as they did, they photosynthesized enough to create an entire atmosphere. (as you know oxygen is a byproduct of photosynthesis)


What percent of earths atmosphere is oxygen?

97%


Is most of the earths atmosphere covered with oxygen?

no


What do scientist think was the source of the oxygen in earths atmosphere?

It came from primitive organisms early in earth's history. They were the first organisms to use photosynthesis to make food, by using light to convert Carbon dioxide and water into glucose (food) and oxygen. Since oxygen is a waste product of photosynthesis, it was released into the air. As more and more of these organisms multiplied, large amounts of oxygen were released into the air, forming today's atmosphere.


The primitave earths atmosphere did not contain?

Oxygen gas


The primative earths atmosphere did not contain?

Free oxygen


What is the major source of oxygen for the earths atmosphere is?

Plants


What gas was not part of early earths atmosphere?

oxygen


What are the primary gases found in earths atmosphere?

Nitrogen and oxygen,