Science
MediumQ. No. how-does-the-earth-s-atmosphere-get-heated
How does the Earth's atmosphere get heated?
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AConduction
BRadiation
CConvection
DAll of the above
Correct Answer: ConvectionYour Answer: C
Last Updated:
The heating of Earth's atmosphere is a classic example tested in competitive exams. Option A (Conduction) is incorrect — air is a poor conductor of heat. The atmosphere cannot primarily heat itself by conduction because air molecules are not closely packed, making conduction negligible over large scales. Option B (Radiation) is incorrect — while the Sun heats the Earth's surface by radiation, the heating of the atmosphere itself (air above the surface) is not primarily by radiation from the surface directly. The image specifically states: पृथ्वी का वायुमंडल किस विधि से गर्म होता है — संवहन विधि से. Option C (Convection) is CORRECT — Earth's atmosphere is heated primarily by convection. The sequence is: (1) Sun's radiation heats Earth's surface. (2) The surface heats the air in contact with it by conduction and radiation. (3) This warm air near the surface expands, becomes lighter, and rises. (4) Cooler air from above sinks to replace it. (5) This continuous cycle of rising warm air and sinking cool air is convection. This creates all weather patterns, winds, monsoons, and atmospheric circulation. Option D (All of the above) is incorrect — while all three modes play some role, the image clearly identifies convection as the primary method of atmospheric heating. For competitive exams the answer is convection.
FAQ
Common questions and clear answers for this topic.
Heat is a form of energy that transfers between objects or systems due to a temperature difference, moving from a hotter body to a cooler one until thermal equilibrium is reached.
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