Question detail
Why is the use of carbonates by marine organisms significant in the context of the carbon cycle?
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 increases atmospheric carbon dioxide
- B. It contributes to long-term carbon storage
- C. It decreases ocean acidity
- D. It promotes photosynthesis
Answer
The correct option is It contributes to long-term carbon storage. This answer is correct because it matches the approved learning objective to explain that marine organisms used carbonates to make shells and skeletons in the subtopic How carbon dioxide decreased.
Explanation
The correct option is It contributes to long-term carbon storage. It contributes to long-term carbon storage is correct because it directly supports the approved learning objective to explain that marine organisms used carbonates to make shells and skeletons. 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 Carbonate Use
Students often confuse the role of carbonates in marine organisms, thinking they are only used for energy rather than for structural purposes.
Emphasize that marine organisms use carbonates to create shells and skeletons, which are crucial for their structure and protection.
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