Question detail
For The Earth's early atmosphere in The composition and evolution of the Earth's atmosphere, which option best answers the process focus in this AQA GCSE Chemistry point: Describe the Earth's early atmosphere as probably containing mainly carbon dioxide with little or no oxygen?
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. Oxygen
- C. Nitrogen
- D. Methane
Answer
The correct option is Oxygen. It is correct because it matches the process focus for Describe the Earth's early atmosphere as probably containing mainly carbon dioxide with little or no oxygen in The Earth's early atmosphere.
Explanation
This question uses a process focus so it stays distinct from related Chemistry of the atmosphere questions. It must be answered in the context of The Earth's early atmosphere in The composition and evolution of the Earth's atmosphere, directly supporting the approved learning objective: Describe the Earth's early atmosphere as probably containing mainly carbon dioxide with little or no oxygen. Distractors or weak answers are incorrect when they drift into a different atmospheric process, pollutant, greenhouse-gas effect, or climate explanation.
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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