What happens to molecules in air as altitude increases in the troposphere?

Question

-they move farther apart from each other
-they get closer to each other
-they become denser
-they stay at the same temperature

Answer 1

As altitude increases in the troposphere, molecules in the air generally move farther apart from each other. This is due to a decrease in air pressure and temperature with increasing altitude, which causes the density of the air to decrease. Therefore, the correct answer is:

• they move farther apart from each other.