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Answered 2012-05-06 15:29:04

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Answered 2020-04-27 18:20:31

how much oxygen was in the Precambrian time?

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How did earths atmosphere change during precambrian time?

The amount of oxygen increased greatly


How did earth atmosphere change during precambrian time?

the amount of oxygen increased greatly


Atmosphere gases in the precambrian?

What evidence shows that the Precambrian atmosphere did not contain oxygen?


Is Precambrian cyanobacteria need oxygen?

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Why is it difficult to study Precambrian time?

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ANSWER:They produced oxygen


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Which gas did volcanoes not produce in the Precambrian era?

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How was the climate in the precambrian time?

The Precambrian refers to the 4000 million years leading up to the Cambrian. That is far to vast a period to give you a "climate" answer for. Because the Earth was so much different then (for instance it had no oxygen in its atmosphere, the tides where much bigger (as the moon was closer) and for a period the earth was completely frozen over (snowball Earth).


Which early Precambrian era converted to oxygen?

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Precambrian time consists of?

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Early organisms in the Precambrian era converted to oxygen?

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How did oxygen get in your atmosphere?

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Why is the Canadian Shield also referred to as the Precambrian Shield?

Because it was created in the precambrian era...The Candadian Shield was formed in the Precambrian Era.The rocks of the Canadian Shield formed during the Precambrian time.


When did the precambrian era begin?

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oxygen


What gas was lacking from Earth's early atmosphere in the early Precambrian era?

Oxygen


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Why is the Precambrian time period segmented into very few parts?

The Precambrian time period is segmented into very few parts because:


When did the Precambrian time begin?

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What percent of the earth history is the Precambrian era responsible for?

The Precambrian time accounts for about 88% of Earth's existence.