Question detail
Which of the following describes the role of dissolved carbon dioxide in the formation of carbonate precipitates?
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 acidity in water.
- B. It reacts with calcium ions to form calcium carbonate.
- C. It is released as a gas.
- D. It promotes photosynthesis.
Answer
The correct option is It reacts with calcium ions to form calcium carbonate.. This answer is correct because it matches the approved learning objective to explain that dissolved carbon dioxide was used to form carbonate precipitates in the subtopic How carbon dioxide decreased.
Explanation
The correct option is It reacts with calcium ions to form calcium carbonate.. It reacts with calcium ions to form calcium carbonate. is correct because it directly supports the approved learning objective to explain that dissolved carbon dioxide was used to form carbonate precipitates. 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 Formation
Students often confuse the process of carbon dioxide dissolving in oceans with the formation of carbonate precipitates, thinking they are the same process.
Clarify that dissolved carbon dioxide reacts with other substances in the water to form carbonate precipitates, which is a separate step in the carbon cycle.
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