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UPSC 2012: Normally, the temperature decreases with the increase in height from the Earth's surface, because 1. the atmosphere can be heated upwards only from the Earth's surface. 2. there is more moisture in the upper atmosphere. 3. the air is less dense in the upper atmosphere. Select the correct answer using the codes given below:
(a)1 only
(b)2 and 3 only
(c)1 and 3 only
(d)1, 2 and 3
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Not attemptedCorrect Answer: (c) 1 and 3 only
Air in the troposphere is mainly warmed from below: the ground absorbs solar radiation and transfers heat upward, so temperature falls with altitude (statement 1 correct). With height the air becomes thinner and expands, causing adiabatic cooling; lower density therefore also contributes to the decrease (statement 3 correct). Moisture actually diminishes rapidly above the lower troposphere, so statement 2 is wrong. Hence only 1 and 3 are correct. ([testbook.com](https://testbook.com/question-answer/ques--601cf464b97e69f0f3e4407d?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2012 Geography question?▼
The correct answer is option (c): 1 and 3 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Atmosphere & Climatology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2012, GS Paper 1, as Question 49. It falls under Geography > Atmosphere & Climatology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Atmosphere & Climatology?▼
UPSC has asked 70 questions from Atmosphere & Climatology (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.