Why is it possible for gas molecules in the exosphere to move away from Earth?
Answer and explanation
Correct answer: Because air is extremely rare and collisions are very few there
The exosphere is the outermost atmospheric region and has an extremely low particle density. Molecules travel long distances without collisions; light particles such as hydrogen and helium can therefore acquire enough speed to move along trajectories that carry them into space, although not every molecule escapes. Option A expresses the relevant concept. Rainfall, mountains and ozone do not propel exospheric molecules away from Earth and are not controlling mechanisms at that altitude.
Frequently asked questions
What is the correct answer to this question?
Because air is extremely rare and collisions are very few there
Why is this the correct answer?
The exosphere is the outermost atmospheric region and has an extremely low particle density. Molecules travel long distances without collisions; light particles such as hydrogen and helium can therefore acquire enough speed to move along trajectories that carry them into space, although not every molecule escapes. Option A expresses the relevant concept. Rainfall, mountains and ozone do not propel exospheric molecules away from Earth and are not controlling mechanisms at that altitude.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Introduction to Accounting. Topic: Accounting Information.
