Why is a large part of atmospheric mass concentrated in the troposphere?
Answer and explanation
Correct answer: Gravity keeps air denser near the surface
The governing concept is gravitational stratification of the atmosphere. Earth’s gravity pulls gas molecules toward the surface, increasing pressure and density in the lowest part of the atmosphere. Consequently, the troposphere contains most of the atmospheric mass, along with most water vapour and weather activity. Pressure does not increase with height, and the other statements describe no valid mechanism, so option B is correct.
Frequently asked questions
What is the correct answer to this question?
Gravity keeps air denser near the surface
Why is this the correct answer?
The governing concept is gravitational stratification of the atmosphere. Earth’s gravity pulls gas molecules toward the surface, increasing pressure and density in the lowest part of the atmosphere. Consequently, the troposphere contains most of the atmospheric mass, along with most water vapour and weather activity. Pressure does not increase with height, and the other statements describe no valid mechanism, so option B is correct.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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