Which air mass is the least dense? 1 warm and dry 2 cold and dry 3 cold and moist 4 warm and moist?

Answer 1

Colder air is more dense. Humid air is more dense.

Answer, #1.

Answer 2

When air masses are compared at the same pressure, warm and moist would be less dense than the others. There are two reasons for this: (1) warm dry air is lighter than cold dry air at the same pressure. That is why air above a fire moves up the chimney. (2) for a given volume of air, the presence of water vapor will further lighten the air mass because the water molecule has a lower molecular weight than the combination of Oxygen and Nitrogen in dry air.

Answer 3

Here's what you need to know to answer this question:

- air becomes less dense as the temperature increases because the air expands and there are less gas molecules per unit volume of air.

- air becomes less dense as the moisture increases because dry air is a mixture made primarily from various nitrogen compounds (mostly NO2), O2, and CO2. The molecular weight of these gases are higher than the weight of water vapor (H2O), so moist air contains a higher percentage of lightweight molecules in comparison to dry air.

Answer 4

warm and dry, if the question was MOST dense, then the above post would be correct

Answer 5

4 = warm and moist

Answer 6

the warm dry is least dense.

Answer 7

warm and dry is least dense

Answer 8

a community of low tension will probable sort. heat air will upward thrust and initiate the introduction of thunderstorms. Hurricanes do not ensue in changing airmasses. If the top point winds are sturdy adequate, the air interior the thunderstorm will start to rotate: at first horizontally, then if sturdy adequate rotation, vertically growing to be tornadoes. wish this enables.