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It expands as the surrounding air pressure lessens. It also cools along with the ambient temperature.
When a body is conducting, its mobility of ions( valence) is responsible for conduction. As mobility increase, conduction increase. That's why falling temperature reduce it and rising temperature increase it.
Most substances expand as they get hotter. When a gas or a liquid expands within an environment of denser and cooler gas or liquid, it will rise. What often happens to the rising material is that at some point it cools off and returns downward, so a circular current is formed, rising and falling. That is called a convection current. Convection can be defined as a heat driven motion of a fluid.
Density currents are warm water rising up, while upwelling is cool water rising. So they're opposites.
Convection occurs when a warm liquid or gas moves moves into a region where the surrounding liquid or gas is a different temperature. An example of this is a warm gas rising into a region where the surrounding gas is cooler due to the lower density of the warm gas. Movement of gases and liquid due to differences in density (because of differences in temperature) is referred to as "natural convection". When the movement is caused by another force such as a pump or a fan or a mixing blade, then it is termed "forced convection".
stratus clouds are formed.
rising
Condensation occurs on the windward side of a mountain. The rising air cools so the air becomes saturated and the water vapor condenses and causes it to rain.
Warms
dew point
Condensation
Condensation
No. May happen when the temp is falling.
Lifting Condensation Level
Condensation
Mountain building
hill