11.   Night falls, the air cools and rain sweeps across the land.

12.   On Friday, the air around Dodge City was quite dry, so the air did not cool enough for the moisture to condense.

13.   Sinking air warms and dries, while rising air cools and moistens.

14.   The air cools noticeably as the funicular climbs up its cog tracks into the high mountains.

15.   The air cools to crisp, sound carries farther.

16.   The air was cooling.

17.   The ascending air cools to saturation, causing clouds and eventually snow to form.

18.   The clouds, in turn, allowed air to cool further by blocking out the sun.

19.   The demand for natural gas as a fuel for air cooling pushed up prices and limited storage purchases, especially in the eastern and midwestern U.S. and Canada.

20.   The drier air cools faster than the moist air and makes the situation even more unstable, producing especially violent thunderstorms.