In which condition does air convergence help more cloud formation?
Answer and explanation
Correct answer: When air rises and cools
At the surface, convergence means that more air is moving into a region than is moving away from it. Because air cannot continue accumulating indefinitely at the ground, it is forced to rise. Rising air expands and cools adiabatically; if it reaches saturation, water vapour condenses on condensation nuclei and clouds develop. Thus, convergence promotes cloud formation mainly when it produces rising and cooling air, making option A correct.
Frequently asked questions
What is the correct answer to this question?
When air rises and cools
Why is this the correct answer?
At the surface, convergence means that more air is moving into a region than is moving away from it. Because air cannot continue accumulating indefinitely at the ground, it is forced to rise. Rising air expands and cools adiabatically; if it reaches saturation, water vapour condenses on condensation nuclei and clouds develop. Thus, convergence promotes cloud formation mainly when it produces rising and cooling air, making option A correct.
Which subject and chapter does this question cover?
This is a Class 12 Geography question. Chapter: Water in the Atmosphere. Topic: Forms of condensation: dew, frost, fog, and mist.
