Why is a large part of the atmosphere’s mass found in the troposphere?
Answer and explanation
Correct answer: Because gravity keeps more air near Earth’s surface
Earth’s gravity attracts atmospheric gases toward the surface, so air is most concentrated in the lowest layer, the troposphere. This produces greater density and pressure near the ground, with both generally decreasing as altitude rises. Option D correctly states the reason. The other choices contradict basic atmospheric structure: the troposphere is not gas-free, not fully ozone-filled, and its position nearest the surface matters.
Frequently asked questions
What is the correct answer to this question?
Because gravity keeps more air near Earth’s surface
Why is this the correct answer?
Earth’s gravity attracts atmospheric gases toward the surface, so air is most concentrated in the lowest layer, the troposphere. This produces greater density and pressure near the ground, with both generally decreasing as altitude rises. Option D correctly states the reason. The other choices contradict basic atmospheric structure: the troposphere is not gas-free, not fully ozone-filled, and its position nearest the surface matters.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
