Was the Timing of the Rise in Earth's Atmospheric Oxygen Triggered by Geological as Opposed to Biological Processes - Research Article from Science in Dispute

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Viewpoint: Yes, the Timing of the Rise in Earth's Atmospheric Oxygen Was Triggered Not by Biological Processes but by Geological Processes Such as Volcanic Eruption, Which Transported Elements (Among Them Oxygen) from Earth's Interior to Its Atmosphere.

Photodissociation

One such geophysical or chemical process is that of photodissociation. Photodissociation is a process driven by the influx of ultraviolet radiation—especially in Earth's upper atmosphere—that results in the liberation of oxygen from water molecules. Just as oxygen-oxygen bonds in ozone molecules are shattered, the oxygen-hydrogen bonds in water molecules are broken by exposure to intense ultraviolet radiation. A portion of the hydrogen ions produced from the breakage then combined to form hydrogen gas that, because of its low mass, can escape Earth's atmosphere into space. Hydroxyl ions (OH...

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This section contains 5,351 words
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Buy the Was the Timing of the Rise in Earth's Atmospheric Oxygen Triggered by Geological as Opposed to Biological Processes Encyclopedia Article
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Was the Timing of the Rise in Earth's Atmospheric Oxygen Triggered by Geological as Opposed to Biological Processes from Science in Dispute. ©2005-2006 Thomson Gale, a part of the Thomson Corporation. All rights reserved.
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