where does that oxygen come from ?

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where does that oxygen come from ?

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https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere

https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere
The Origin of Oxygen in Earth’s Atmosphere – Scientific American
Yet no one has come up with a rock-solid test to determine the precise oxygen content of the atmosphere at any given time from the geologic record. But one thing is clear—the origins of oxygen …

https://www.planetary.org/articles/how-did-earth-get-its-oxygen

https://www.planetary.org/articles/how-did-earth-get-its-oxygen
How did Earth get its oxygen? | The Planetary Society
11 mai 2023The byproduct of photosynthesis is oxygen. The estimated time at which this happened varies from 3.0 billion to 2.8 billion to 2.7 billion to 2.5 billion years ago. Cyanobacteria under the microscope Cyanobacteria are responsible for the production of Earth’s early oxygen. This type of cyanobacteria, Prochlorococcus, produces 20% of the …

https://www.sciencealert.com / where-did-earth-s-oxygen-come-from

https://www.sciencealert.com / where-did-earth-s-oxygen-come-from
Where Did Earth’s Oxygen Come From? : ScienceAlert
Bodies of water pooled long enough for various geochemical reactions – and possibly precursors to biochemistry – to take place, leaving the planet with a thickening atmosphere made up mostly of carbon dioxide and nitrogen. There were possibly occasional ‘whiffs’ of oxygen puffing up from volcanic activity, here and there.

https://www.popularmechanics.com/space/solar-system/a28764282/where-does-oxygen-come-from

https://www.popularmechanics.com/space/solar-system/a28764282/where-does-oxygen-come-from
Oxygen Facts | What is Oxygen and Where Does it Come From?
During those collisions, the carbon nuclei overtake the helium nuclei, and in that process radiate energy in the form of a photon. That process leaves what’s known as oxygen-16 nucleus, which …

https://earthsky.org/earth/when-where-earths-o2-oxygen-rise-began

https://earthsky.org/earth/when-where-earths-o2-oxygen-rise-began
When and where did Earth get its oxygen? | Earth | EarthSky
Ostrander said: Our discovery forces us to rethink the initial oxygenation of Earth. Many lines of evidence suggest that O2 started to accumulate in Earth’s atmosphere after about 2.5 billion …

https://en.wikipedia.org/wiki/Oxygen

https://en.wikipedia.org/wiki/Oxygen
Oxygen – Wikipedia
Oxygen is a chemical element; it has symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Oxygen is the most abundant element in Earth’s crust, and after hydrogen and helium, it …

https://oceanservice.noaa.gov/facts/ocean-oxygen.html

https://oceanservice.noaa.gov/facts/ocean-oxygen.html
How much oxygen comes from the ocean? – NOAA’s National Ocean Service
About half of Earth’s oxygen comes from the ocean; about the same amount is consumed by marine life . The surface layer of the ocean is teeming with photosynthetic plankton. Though they’re invisible to the naked eye, they produce more oxygen than the largest redwoods. Scientists estimate that roughly half of the production on Earth …

https://www.britannica.com/science/oxygen

https://www.britannica.com/science/oxygen
Oxygen | Discovery, Symbol, Properties, Uses, & Facts
21 mars 2024Occurrence and properties. At 46 percent of the mass, oxygen is the most plentiful element in Earth’s crust. The proportion of oxygen by volume in the atmosphere is 21 percent and by weight in seawater is 89 percent. In rocks, it is combined with metals and nonmetals in the form of oxides that are acidic (such as those of sulfur, carbon, aluminum, and phosphorus) or basic (such as those of …

https://www.whoi.edu/know-your-ocean/did-you-know/does-the-ocean-produce-oxygen

https://www.whoi.edu/know-your-ocean/did-you-know/does-the-ocean-produce-oxygen
Does the ocean produce oxygen? – Woods Hole Oceanographic Institution
Trees pump out oxygen—the same stuff we breathe in. The bigger the tree the more oxygen it releases. But most of our breathable air doesn’t come from land. It comes from the world’s oceans. And the most important oxygen producers are some of the tiniest organisms on Earth. The air we breathe is 78 percent nitrogen and 21 percent .

https://theconversation.com/where-did-the-earths-oxygen-come-from-new-study-hints-at-an-unexpected-source-191673

https://theconversation.com/where-did-the-earths-oxygen-come-from-new-study-hints-at-an-unexpected-source-191673
Where did the Earth’s oxygen come from? New study hints at an …
28 nov. 2022Our research, published in Nature Geoscience, adds a tantalizing new possibility: that at least some of the Earth’s early oxygen came from a tectonic source via the movement and destruction of …
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