|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.|
A) 1 only
B) 2 and 3 only
C) 1 and 3 only
D) 1, 2 and 3
Correct Answer: C
Solution :The temperature decreases with height in the lowest 10-20 km of the atmosphere (called the troposphere) because most of the solar radiation passes through the atmosphere with little or no effect - that radiation is absorbed by the solid Earth surface and is transferred to the air above the surface by conduction.
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