Question

what is considered mass of air
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Answer 1

Answer:

Air masses are large volumes of air that have generally the same temperature and pressure. Unstable air masses have different temperatures and pressures. Unstable air masses, like this one over the North Sea in Germany, can produce storms.

Answer 2

Answer:

Encyclopedic entry. An air mass is a large volume of air in the atmosphere that is mostly uniform in temperature and moisture. Air masses can extend thousands of kilometers in any direction, and can reach from ground level to the stratosphere—16 kilometers (10 miles) into the atmosphere.

Explanation:

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