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Author Question: How were conditions on the early Earth of more than 3 billion years ago differen (Read 735 times)

penguins

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on: Jul 12, 2013
How were conditions on the early Earth of more than 3 billion years ago different from those on today's Earth?
A) Only early Earth was intensely bombarded by large space debris.
B) Only early Earth had an oxidizing atmosphere.
C) Less ultraviolet radiation penetrated early Earth's atmosphere.
D) Early Earth's atmosphere had significant quantities of ozone.


Millan

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Reply #1 on: Jul 13, 2013
I know it's A, we did this last month ;)


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penguins

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Reply #2 on: Jul 18, 2013
Thank you, thank you!!


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