11.   As the warm air rises, new supplies of oxygen are pulled in.

12.   Because air is rising vigorously over the storm, air will sink south of the storm, setting the stage for a sunny day across the Florida peninsula.

13.   A series of disturbances will cause mild, moist air to rise as it encounters a mound of Arctic air centered over eastern Canada.

14.   Advancing warm and humid air will rise over cooler air in the central Mississippi Valley.

15.   Clouds and some patchy rain and sleet will plague northernmost New England where the warm air rises over cool air across the region.

16.   Clouds will increase over the Middle West as warm, humid air rises over a dome of cooler air across the upper Lakes.

17.   Clouds and showers will cover much of the Northeast as mild air rises over cooler air at the ground.

18.   Even though warm air rises, heat also radiates down through the floorboards.

19.   Farther north, clouds will form in the Missouri Valley as mild, moist air rises over cool air to the north.

20.   He said when the fan is off, cool air settles near the floor in your house and warm air rises toward the ceiling.