Question detail
What role do marine organisms play in 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. They release carbon dioxide into the atmosphere.
- B. They use carbonates to form shells and skeletons.
- C. They absorb oxygen from the water.
- D. They decompose organic matter.
Answer
The correct option is They use carbonates to form shells and skeletons.. This answer is correct because it matches the approved learning objective to link carbon dioxide removal to changes in the carbon cycle in the subtopic How carbon dioxide decreased.
Explanation
The correct option is They use carbonates to form shells and skeletons.. They use carbonates to form shells and skeletons. is correct because it directly supports the approved learning objective to link carbon dioxide removal to changes in the carbon cycle. 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
Linking Carbon Dioxide Removal
Students often confuse the processes of carbon dioxide removal with unrelated environmental changes, failing to connect them to the carbon cycle.
Do not treat this as a general statement about carbon cycle. Instead, answer by clearly linking the correction to link carbon dioxide removal to changes in the carbon cycle in How carbon dioxide decreased. This keeps the response inside The composition and evolution of the Earth's atmosphere and prevents a vague or off-topic GCSE answer. The mistake to avoid is: students often confuse the processes of carbon dioxide removal with unrelated environmental changes, failing to connect them to the carbon cycle.
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