Why can low water vapour in desert regions increase the day-night temperature range?
Answer and explanation
Correct answer: Because low water vapour reduces the ability to retain heat at night
The governing concept is the greenhouse role of water vapour and the daily heat budget. During the day, the desert surface heats strongly, but after sunset a dry atmosphere contains less water vapour to absorb and re-emit outgoing infrared radiation. Therefore, heat escapes rapidly at night, while daytime heating remains intense, producing a large range. Option A is correct; the other options are scientifically unrelated.
Frequently asked questions
What is the correct answer to this question?
Because low water vapour reduces the ability to retain heat at night
Why is this the correct answer?
The governing concept is the greenhouse role of water vapour and the daily heat budget. During the day, the desert surface heats strongly, but after sunset a dry atmosphere contains less water vapour to absorb and re-emit outgoing infrared radiation. Therefore, heat escapes rapidly at night, while daytime heating remains intense, producing a large range. Option A is correct; the other options are scientifically unrelated.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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