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where does that oxygen come from ?

Here are some links that might be useful to you:

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://bescienced.com/where-does-the-oxygen-we-breathe-come-from

https://bescienced.com/where-does-the-oxygen-we-breathe-come-from
Where does oxygen come from? – BeScienced
Most of Earth’s atmospheric oxygen that we depend on as humans comes predominantly from the ocean. More specifically from microscopic ocean plants called phytoplankton. Phytoplankton grow and get their own energy through photosynthesis and are responsible for producing an estimated 50% of the world’s . Most phytoplankton are too small …

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?
Scientists at MIT are trying to figure out where the oxygen in the universe comes from, and how oxygen and carbon are made. Now the physicists have come up with an experimental design to track a …

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://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://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 …

https://askanearthspacescientist.asu.edu/explore/early-atmosphere

https://askanearthspacescientist.asu.edu/explore/early-atmosphere
The History of Earth’s Atmosphere – Ask An Earth and Space Scientist
The oxygen atoms in Earth’s atmosphere were first formed in an old star, along with all the other elements that make up the Earth. When that star exploded (a supernova) all the elements spread out in space. They formed a hot gas cloud where our solar system is today. As the gas cooled, it condensed into rocky and icy planets around a new star …

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 …
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