Question detail
Which of the following gases is present in small proportions in the Earth's atmosphere?
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. Nitrogen
- B. Oxygen
- C. Carbon dioxide
- D. Hydrogen
Answer
The correct option is Carbon dioxide. This answer is correct because it matches the approved learning objective to interpret simple data showing the proportions of gases in the atmosphere in the subtopic The proportions of different gases in the atmosphere.
Explanation
The correct option is Carbon dioxide. Carbon dioxide is correct because it directly supports the approved learning objective to interpret simple data showing the proportions of gases in the atmosphere. This belongs to the subtopic The proportions of different gases in the atmosphere 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 The proportions of different gases in the atmosphere.
Common mistake
Misinterpreting Gas Proportions
Students often misinterpret data showing the proportions of gases in the atmosphere, confusing the percentages of nitrogen and oxygen.
To fix this, carefully review the data and remember that nitrogen makes up about 80% and oxygen about 20% of the atmosphere.
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