11.   Formed by ice and shaped by wind, rain and fire, grassy sandplain moors are home to dozens of rare plants and animals.

12.   He said ice was forming on the leading edges of the wings.

13.   Ice formed a half-inch thick in May.

14.   Ice will form on a roof sometimes, especially on the gutters.

15.   Ice formed on the plane.

16.   Ice can form only if the proportion of water vapor in the cold air is particularly high.

17.   In Washington the National Cathedral was shrouded in fog while ice formed on trees providing this wintery scene early Thursday.

18.   Mission managers feared ice might form in the lines, causing the piping to burst.

19.   The company said the ice formation was an effective visual cue and early warning system that ice may be forming on the rest of the plane.

20.   The insulation is critical to ensure that ice does not form on the tank after supercold liquid hydrogen and oxygen fuels are loaded.