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Questions and Answers
During the first billion years of the Earth's existence, what caused the release of large quantities of carbon dioxide?
During the first billion years of the Earth's existence, what caused the release of large quantities of carbon dioxide?
What resulted in the formation of oceans on Earth?
What resulted in the formation of oceans on Earth?
What process underpinned the increase in the atmospheric concentration of oxygen?
What process underpinned the increase in the atmospheric concentration of oxygen?
What led to the ever-increasing rate of oxygen accumulation in the atmosphere?
What led to the ever-increasing rate of oxygen accumulation in the atmosphere?
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What was the result of reaching a threshold concentration of oxygen in the atmosphere?
What was the result of reaching a threshold concentration of oxygen in the atmosphere?
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During the early years of the Earth's existence, what two gases were released into the atmosphere by highly active volcanoes?
During the early years of the Earth's existence, what two gases were released into the atmosphere by highly active volcanoes?
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What process led to the formation of oceans on Earth?
What process led to the formation of oceans on Earth?
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What is the main source of energy for photosynthesis?
What is the main source of energy for photosynthesis?
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What led to the ever-increasing rate of oxygen accumulation in the atmosphere?
What led to the ever-increasing rate of oxygen accumulation in the atmosphere?
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What happened when a threshold concentration of oxygen was reached in the atmosphere?
What happened when a threshold concentration of oxygen was reached in the atmosphere?
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