As Oxygen Appeared in the Atmosphere, ________ Also Accumulated, Which

question 24

Multiple Choice

As oxygen appeared in the atmosphere, ________ also accumulated, which formed a protective barrier that protects the Earth from ________.

• A) ozone / UV radiation
• B) elemental sulfur / volcanism
• C) ferrous iron / hydroxylating radicals
• D) sulfate / hydrogen sulfide

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Definitions:

Tension

A state of mental or emotional strain or suspense, often resulting from conflicting or competing forces, interests, or wants.

Relaxation

The process or activity of reducing tension and stress, often through leisure activities, to promote physical and mental well-being.

Marital Infidelities

Acts of unfaithfulness or cheating in a marriage.

American Society

The social structure, cultural norms, and community life characteristic of the United States, marked by diversity and a range of societal values.