Question detail
What is the primary reason for the decrease of carbon dioxide in the Earth's atmosphere over geological time?
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. Increased volcanic eruptions
- B. Photosynthesis by plants and algae
- C. Dissolution in oceans and formation of carbonate rocks
- D. Decomposition of organic matter
Answer
The correct option is Dissolution in oceans and formation of carbonate rocks. This answer is correct because it matches the approved learning objective to explain that carbon dioxide dissolved in the oceans as the atmosphere changed in the subtopic How carbon dioxide decreased.
Explanation
The correct option is Dissolution in oceans and formation of carbonate rocks. Dissolution in oceans and formation of carbonate rocks is correct because it directly supports the approved learning objective to explain that carbon dioxide dissolved in the oceans as the atmosphere changed. This belongs to the subtopic How carbon dioxide decreased 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 How carbon dioxide decreased.
Common mistake
Misunderstanding Carbon Dioxide Dissolution
Students often think that carbon dioxide simply disappears from the atmosphere without any process involved.
Emphasize that carbon dioxide dissolves in the oceans, which is a key process in the changing composition of the atmosphere.
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