Question detail
For How carbon dioxide decreased in The composition and evolution of the Earth's atmosphere, which option best answers the exam wording focus in this AQA GCSE Chemistry point: Describe limestone, coal, crude oil and natural gas as long-term carbon stores?
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. Coal
- B. Crude oil
- C. Natural gas
- D. Carbon dioxide
Answer
The correct option is Carbon dioxide. It is correct because it matches the exam wording focus for Describe limestone, coal, crude oil and natural gas as long-term carbon stores in How carbon dioxide decreased.
Explanation
This question uses a exam wording focus so it stays distinct from related Chemistry of the atmosphere questions. It must be answered in the context of How carbon dioxide decreased in The composition and evolution of the Earth's atmosphere, directly supporting the approved learning objective: Describe limestone, coal, crude oil and natural gas as long-term carbon stores. Distractors or weak answers are incorrect when they drift into a different atmospheric process, pollutant, greenhouse-gas effect, or climate explanation.
Common mistake
Misunderstanding Carbon Stores
Students often confuse limestone, coal, crude oil, and natural gas as being the same type of carbon store.
Clarify that limestone is a sedimentary rock, while coal, crude oil, and natural gas are fossil fuels formed from organic matter.
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