If one were to ride a hot air balloon up into the atmosphere,one would experience the concentration of gases ____________.
A)becoming denser
B)becoming less dense
C)remaining the same
D)increasing for the first 10 km,then starts to decline

Question

Quizplus · Accepted Answer

As one goes up into the atmosphere, the air pressure decreases and the concentration of gases becomes less dense. This is because the Earth's gravity is weaker at higher altitudes, so the air molecules are further apart. This decrease in density is a gradual process as altitude increases.

If One Were to Ride a Hot Air Balloon Up