why does oxygen come from ?

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why does 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
At roughly the same time (and for eons thereafter), oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the …
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New Theory Explains How Earth’s Early Atmosphere Became Oxygen-Rich
Without oxygen, the most sophisticated life on the earth would have been green microbial scum, study author David Catling notes. Fortunately, some bacteria in the early oceans were able to …
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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://www.britannica.com / science / oxygen

https://www.britannica.com / science / oxygen
Oxygen | Discovery, Symbol, Properties, Uses, & Facts
24 févr. 2024oxygen (O), nonmetallic chemical element of Group 16 (VIa, or the oxygen group) of the periodic table. Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the to the atmosphere.

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.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?
The job description of a physicist is to understand the world, and right now, we don’t quite understand where the oxygen in the universe comes from, and, how oxygen and carbon are made, says …

https://news.mit.edu/2016/oxygen-first-appearance-earth-atmosphere-0513

https://news.mit.edu/2016/oxygen-first-appearance-earth-atmosphere-0513
Study pinpoints timing of oxygen’s first appearance in Earth’s …
However, as Summons puts it, oxygen in the ancient ocean would have instantly been sucked up by hungry microbes, ferrous iron, and other sinks, keeping it from escaping into the atmosphere. There may have been earlier, and temporary, ‘whiffs’ of oxygen in the atmosphere, but their abundances and durations are not currently …

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
That happened 4,400 years ago during the flood. Earth’s atmosphere contains about 21% oxygen today. Plants produce it, and animals – including humans – breathe it. Ancient rocks provide clues …

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://en.wikipedia.org/wiki/Geological_history_of_oxygen

https://en.wikipedia.org/wiki/Geological_history_of_oxygen
Geological history of oxygen – Wikipedia
Geological history of oxygen. O 2 build-up in the Earth’s atmosphere. Red and green lines represent the range of the estimates while time is measured in billions of years ago ( Ga ). Stage 1 (3.85-2.45 Ga): Practically no O 2 in the atmosphere. Stage 2 (2.45-1.85 Ga): O 2 produced, but absorbed in oceans and seabed rock.

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. 2022The driving of ocean water deep into the Earth, caused by the sliding of oceanic plates under the Earth’s continental plates, may generate free oxygen as well as the mechanism to release it …
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