Question detail
Which of the following statements about the Earth's early atmosphere is correct?
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. It contained high levels of oxygen.
- B. It was primarily composed of carbon dioxide.
- C. It had no water vapour.
- D. It was similar to today's atmosphere.
Answer
The correct option is It was primarily composed of carbon dioxide.. This answer is correct because it matches the approved learning objective to recall that volcanoes released carbon dioxide, water vapour and nitrogen in the subtopic The Earth's early atmosphere.
Explanation
The correct option is It was primarily composed of carbon dioxide.. It was primarily composed of carbon dioxide. is correct because it directly supports the approved learning objective to recall that volcanoes released carbon dioxide, water vapour and nitrogen. 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 Gas Release
Students often confuse the gases released by volcanoes, thinking they only released carbon dioxide and ignoring water vapour and nitrogen.
Remember that volcanoes released carbon dioxide, water vapour, and nitrogen. It's helpful to create a list of all gases released during volcanic activity.
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