The process of water vapor changing directly to ice without becoming a liquid first is called ...

The process of water vapor changing directly to ice without becoming a liquid first is called ____________________.
   
  Fill in the blank with correct word.

Question 2

When surfaces such as twigs, leaves, and blades of grass cool below the saturation temperature, water vapor begins to condense upon them, forming tiny visible specks of water called ____________________. If the air temperature should drop to freezing or below, the ____________________ will freeze, becoming tiny beads of ice called ____________________.
   
  Fill in the blank with correct word.

Question 3

As the air cools during the night, the relative humidity increases. When the relative humidity reaches about 75 percent, condensation may begin on the most active hygroscopic nuclei, producing a ____________________ haze.
   
  Fill in the blank with correct word.

Question 4

____________________ fog is rare over tropical water.
   
  Fill in the blank with correct word.

Question 5

____________________ fog forms when two unsaturated bodies of air mix and the resulting mixture is saturated.
   
  Fill in the blank with correct word.