SOLAR SYSTEM

Detailed explanation-1: -Air density is higher at lower altitudes. There is more space between air molecules at higher altitudes.

Detailed explanation-2: -As altitude increases, the amount of gas molecules in the air decreases-the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by “thin air.” Thin air exerts less pressure than air at a lower altitude.

Detailed explanation-3: -Air density is determined by Pressure, Temperature, and Humidity. On a hot, muggy day, the air becomes “thinner” or less dense, and its density at a pilot’s location is equivalent to a higher altitude in the standard atmosphere.

Detailed explanation-4: -The pressure forces the air molecules together resulting in more mass in a given volume. Increasing altitude results in decreasing air pressure. The decrease in air density means that a mountain climber at high altitudes gets less oxygen when he breathes. Temperature is another factor that affects the density of air.