Does the expansion of air cause its temperature to increase or ...

[geoffrey]

Does the expansion of air cause its temperature to increase or decrease? Why?

Question 2

What is a squall line? Where would you expect squall lines to form?

[Jevvish]

Answer to Question 1

Expansion decreases the temperature of air. As air rises in the atmosphere the surrounding air pressure decreases allowing for the air to expand. Because there is no other energy source, the air molecules use their own energy to spread out. This energy loss causes a reduction in molecular speed and, therefore, air temperature as well.

Answer to Question 2

A squall line is a line of multicell thunderstorms. They may form directly along a cold front and extend for hundreds of kilometers. Squall lines can also form in the warm air 100 to 300 km out ahead of the cold front. These storms are called pre-frontal squall line thunderstorms and represent the largest and most severe types of squall-lines in the middle latitudes. Squall lines are one type of a mesoscale convective system (MCS).

[geoffrey]

TY

[Jevvish]

Happy to Help