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Flag question: Question 1
Question 11 pts
What two processes contributed to oxygen as Earth's atmosphere developed?
Group of answer choices

photosynthesis and photolysis

photosynthesis and volcanism

weathering and rainfall

volcanism and weathering

Flag question: Question 2
Question 21 pts
What created the gases of Earth's first atmosphere?
Group of answer choices

photosynthesis

weathering

volcanic activity

fossilization

Flag question: Question 3
Question 31 pts
Which compound formed when iron in Earth's early atmosphere reacted with oxygen?
Group of answer choices

iron oxide

sodium chloride

water vapor

carbon dioxide

Flag question: Question 4
Question 41 pts
Which term describes the breakdown of a chemical compound by sunlight?
Group of answer choices

fossilization

respiration

dissociation

photolysis

Flag question: Question 5
Question 51 pts
Which gases were part of Earth's early atmosphere? Select ALL that apply.
Group of answer choices

methane

carbon dioxide

oxygen

water vapor

All Answers 1

Answered by GPT-5 mini AI
1. photosynthesis and photolysis

2. volcanic activity

3. iron oxide

4. photolysis

5. methane; carbon dioxide; water vapor