Question detail
What happens to infrared radiation emitted by the Earth in the presence of greenhouse gases?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Carbon dioxide and methane as greenhouse gases
Question
- A. It is completely absorbed
- B. It is reflected back into space
- C. It is absorbed and re-emitted in all directions
- D. It has no effect
Answer
The correct option is It is absorbed and re-emitted in all directions. This answer is correct because it matches the approved learning objective to explain how greenhouse gases help maintain temperatures on Earth in the subtopic Greenhouse gases.
Explanation
The correct option is It is absorbed and re-emitted in all directions. It is absorbed and re-emitted in all directions is correct because it directly supports the approved learning objective to explain how greenhouse gases help maintain temperatures on Earth. This belongs to the subtopic Greenhouse gases within Carbon dioxide and methane as greenhouse gases, 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 Greenhouse gases.
Common mistake
Misunderstanding the Role of Greenhouse Gases
Students often think that greenhouse gases only trap heat without understanding their role in maintaining Earth's temperature.
Emphasize that greenhouse gases absorb infrared radiation emitted from the Earth's surface, which helps to maintain a stable temperature necessary for life.
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