QuestionMay 18, 2025

What do theories hypothesize about the conditions of Earth's early atmosphere? Little to no oxygen Low levels of ultraviolet radiation Protective atmosphere Very cold temperatures

What do theories hypothesize about the conditions of Earth's early atmosphere? Little to no oxygen Low levels of ultraviolet radiation Protective atmosphere Very cold temperatures
What do theories hypothesize about the conditions of Earth's early atmosphere?
Little to no oxygen
Low levels of ultraviolet radiation
Protective atmosphere
Very cold temperatures

Solution
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Answer

Little to no oxygen Explanation 1. Identify key hypotheses Theories about Earth's early atmosphere often hypothesize **little to no oxygen** due to the lack of photosynthetic organisms at that time. 2. Evaluate other conditions Low levels of ultraviolet radiation and a protective atmosphere are unlikely because the early Earth lacked an ozone layer, which forms from oxygen. Very cold temperatures are not typically emphasized in early atmospheric theories.

Explanation

1. Identify key hypotheses<br /> Theories about Earth's early atmosphere often hypothesize **little to no oxygen** due to the lack of photosynthetic organisms at that time.<br /><br />2. Evaluate other conditions<br /> Low levels of ultraviolet radiation and a protective atmosphere are unlikely because the early Earth lacked an ozone layer, which forms from oxygen. Very cold temperatures are not typically emphasized in early atmospheric theories.
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