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2. Select words from the list below to complete the following sentences. Some of the words
may be used more than once, and you may have to make the word plural or change the
tense. Do not try to write the words in the spaces.

Lift effect thick (-er, -est)

drag supercooled thin (-er, -est)

thrust clear ice
structure rime ice

a. Increased weight is one of the ______________________________ of icing on aircraft.

b. When the downward and upward forces are in an equilibrium, the aircraft keeps flying at
the same altitude. If the _____________________________________force is increased,
the aircraft will increase its altitude.
C. When ice is 1ike glass and you can see through it, it is called______________________ .

d. Normally water freezes at O'C; but sometimes drops stay liquid at temperatures below 0'C.
They are called ________________________________________drops.

e. Often when a large building is built, they will complete the
________________________________before they put in any walls or floors.

f. The engine of the aircraft provides the ______________________________that moves
forward.

g. A person who is 2 meters tall and weighs 60 kilograms is a ___________________person.
h. Hail is similar to _____________________________ because it is usually rough and white.

i. A book with 300 pages is usually________________________. than a book with 100 pages.

j. Since icing affects the airflow over an aircraft's structure, force. it usually increases the
__________________________ force.
k. It is easy to remember the forces acting on an aircraft as opposites;______________
opposes weight,______________________________ opposes thrust.

i. If ______________________ and ___________________________occur at the same time,
it is called mixed ice.

m. Haze isn't like precipitation; it has no ______________________ no the aircraft, it only
limits visibility.
n. The ___________________________________ of the aircraft is covered with thin metal.