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III. VOCABULARY EXPANSION: Oral Exercises

1. Select words from the lists given below to complete the sentences.

a. intensify intense intensity

(1) The strength of the updrafts will ____________________

as the cumulus stage progresses.

(2) There is some difficulty in identifying the _____________

of turbulence because it depends on the pilot's judgment.

(3) A pilot may encounter _______________ turbulence even

though he is some distance from the thunderstorm.

(4) When turbulence reaches "extreme" _________________

it may be impossible to control the aircraft's altitude and attitude.

B. vary variation variable

(1) CAT is a _______________ of wind shear turbulence that exists

at high altitudes.

(2) Its occurrence _____________ according to the season; it is more

frequent during the winter.

(3) In this season the winds are ___________________ ; they may come
from any direction.

(4) The atmospheric pressure _______________ from day to day even

though the temperature might not change.