Geography2012
Normally, the temperature decreases with the increase in height from the Earth’s surface, because
- The atmosphere can be heated upwards only from the
- There is more moisture in the upper atmosphere.
- The air is less dense in the upper atmosphere.
Select the correct answer using the codes given below:
Explanation
The correct option is "1 and 3 only" because the primary reason for the decrease in temperature with altitude is that the Earth's surface heats the atmosphere through conduction and radiation, which diminishes with height as the direct heat source is further away. Furthermore, the air density decreases with altitude, resulting in less air pressure and fewer air molecules to absorb heat, contributing to lower temperatures in the upper atmosphere. This explanation aligns with the principles of atmospheric science outlined in standard UPSC resources like NCERT textbooks.