Question

which correctly lists three characteristics that are used to describe air?
altitude, density, radiation
density, radiation, mass
mass, pressure, density
pressure, altitude, radiation

Explanation:

• Altitude: It is a measure of height above a reference point (like sea - level) and is not an inherent characteristic of air itself. Air can exist at various altitudes, but altitude is a property of the location of the air, not of the air.
• Radiation: Radiation is energy in the form of waves or particles. Air can interact with radiation (e.g., absorb or scatter it), but it is not a fundamental characteristic used to describe the physical nature of air.
• Mass: Air is made up of molecules (such as \(N_2\), \(O_2\), \(CO_2\) etc.), and since molecules have mass, air has mass.
• Pressure: Air exerts pressure. The weight of the air column above a given point creates atmospheric pressure.
• Density: Density (\(

ho=\frac{m}{V}\)) is a characteristic of air. The density of air changes with temperature, pressure, and composition.

Answer:

mass, pressure, density