Warm air. the temp of air is the measure of kinetic energy the air has.
Lower energy.
Cool air layered over warm air is definitely a more stable atmospheric condition.
Warm air. It's denser and can therefore hold more than cool air.
by the time when warm air meets cool air.
Cool air, it is more dense.
Warm air molecules are fast moving and therefore less dense than cold air molecules. Since cold air is more dense (more slowly moving) it sinks.
There are more atoms in cold air than warm.
That is related to energy required for heating. If you require energy to keep your house warm, a draft can take energy out - replacing hot air with cold air. This will require more heating. In summer, the situation is similar - except that the wasted energy is related to air-conditioning, and that cool air will be replaced with warm air.
Warm air is less dense than cool air.
Warm air is above cool air.
yes it definitely can
false...air has no ability to "hold" water vapor