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The first organisms that released oxygen into Earth's atmosphere were cyanobacteria, also known as blue-green algae. These microorganisms performed photosynthesis, using sunlight to convert carbon dioxide and water into glucose and oxygen. This process began approximately 2.4 billion years ago during the Great Oxygenation Event, fundamentally changing the planet's atmosphere and paving the way for the evolution of aerobic life forms.
What else can I help you with?
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
What does gas do to some scientist think was missing from earths early atmosphere?
oxygen
How is the balance mainted between the volume of carbon dioxide and oxygen in atmosphere?
The balance of oxygen and carbon dioxide is maintained in the atmosphere by the oxygen released by plant during photosynthesis and carbon dioxide released by human ,animal's etc in the atmosphere
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.
Makes up 21 percent of the atmosphere?
Oxygen makes up 21% of the Earths atmosphere.
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
What percent of earths atmosphere is oxygen?
97%
Is most of the earths atmosphere covered with oxygen?
no
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.
The primative earths atmosphere did not contain?
Free oxygen
The primitave earths atmosphere did not contain?
Oxygen gas
What is the major source of oxygen for the earths atmosphere is?
Plants
What gas was not part of early earths atmosphere?
oxygen
What describes the earths atmosphere?
mostly nitrogen with 21% oxygen
Was the earths early atmosphere made up of mostly oxygen?
no
What are the primary gases found in earths atmosphere?
Nitrogen and oxygen,
What was the major contributor of oxygen to earths early atmosphere?
photosynthsis
