1.   The guard hairs are hollow, trapping air within and between them, and the underfur also traps air.

2.   The ice is fickle, sometimes weakened by sunlight, or corroded by trapped air.

3.   A vortex of winds continually blows around Antarctica, tending to trap cold air at the South Pole.

4.   But just like home insulation, air must be trapped for the dynamic to work.

5.   Cold air will be trapped in the valleys of the central Rockies with dense fog along rivers.

6.   Farther inland, cold air trapped in the valleys from northeast New York to southern Maine will allow for a period of freezing rain during the morning.

7.   From house to heated car, a closed paper or plastic bag will trap warm air long enough.

8.   Incidentally, if you pull the shades down at night, you may be aggravating the situation by trapping moist air between shade and glass.

9.   Insulation material is designed to trap air in a network of minute, closed pockets.

10.   Insulation can help to cut heat losses in a house, but it can also create additional problems when it traps the moisture-laden air.