The denser packing of molecules at the bottom of the atmosphere than molecules at the top of the atmosphere is a result of ________.
A) Coriolis effect
B) friction
C) gravity
D) the sorting caused by varying weights of the gases
E) very good planning at the time of Earth's beginnings

Question

Quizplus · Accepted Answer

Gravity is responsible for the denser packing of molecules at the bottom of the atmosphere. As molecules are attracted to Earth's surface by gravity, the ones closest to the surface are held more tightly and compressed by the weight of the ones above them, resulting in greater air density at lower altitudes.

The Denser Packing of Molecules at the Bottom of the Atmosphere