Question detail
Which of the following gases is NOT considered a major component of the Earth's early atmosphere?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The composition and evolution of the Earth's atmosphere
Question
- A. Carbon dioxide
- B. Water vapour
- C. Oxygen
- D. Nitrogen
Answer
The correct option is Oxygen. This answer is correct because it matches the approved learning objective to describe the Earth's early atmosphere as probably containing mainly carbon dioxide with little or no oxygen in the subtopic The Earth's early atmosphere.
Explanation
The correct option is Oxygen. Oxygen is correct because it directly supports the approved learning objective to describe the Earth's early atmosphere as probably containing mainly carbon dioxide with little or no oxygen. This belongs to the subtopic The Earth's early atmosphere within The composition and evolution of the Earth's atmosphere, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from The Earth's early atmosphere.
Common mistake
Misunderstanding Early Atmosphere Composition
Students often state that the Earth's early atmosphere contained mainly oxygen instead of carbon dioxide.
Remember that the Earth's early atmosphere is described as probably containing mainly carbon dioxide with little or no oxygen.
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