Question

Which correctly lists three characteristics that are used to describe air?

-altitude, density, radiation
-density, radiation, mass
-mass, pressure, density
-pressure, altitude, radiation

Answer 1

The three characteristics used to describe air are mass, pressure, and density. Air density decreases with altitude, and gases, including air, are more compressible than liquids.

Step-by-step explanation:

The characteristics used to describe air include mass, pressure, and density. The density of air is known to decrease with an increase in altitude. This density variation is exemplified by a graph which shows that air is denser at ground level and becomes thinner as one ascends. For instance, a cubic meter of air at sea level is heavier than the same volume of air at the top of Mount Everest. Additionally, air can be easily compressed compared to liquids, and the behavior of gases differs from that of liquids due to these physical properties.

Answer 2

The correct characteristics used to describe air are mass, pressure, and density. Air density decreases with altitude, so at higher altitudes, air becomes thinner.

Step-by-step explanation:

Three characteristics that are used to describe air are mass, pressure, and density. The density of air decreases with altitude; that is, the higher the altitude, the thinner the air becomes. This is evident when mountain climbers require oxygen tanks as they reach higher altitudes like the peak of Mount Everest, which has very low air density. Moreover, additional information beyond average density may be needed to identify the substances in objects composed of more than one material, as density alone may not provide full identification.