What occurs when air is subjected to less pressure? a. The air ...

[luvbio]

What occurs when air is subjected to less pressure?
  a. The air becomes compressed.
  b. The air expands
  c. The air rises in temperature.
  d. The water vapor is able to condense

Question 2

Where do tropical cyclones come from?
  a. High pressure systems
  b. Between air masses
  c. Within a single warm and humid air mass
  d. Within a single cool and dry air mass

[lin77x]

Answer to Question 1

ANS: B
As air is subjected to less pressure, air expands. This expanded air is cooler than air that has been
compressed. The cooling of air occurs at higher altitudes where less pressure is exerted on the air.
Information can be found in the section The Atmosphere Is Composed Mainly of Nitrogen, Oxygen,
and Water Vapor

Answer to Question 2

ANS: C
Vilhelm Bjerknes realized tropical cyclones form due to disturbances within a single warm and humid
air mass. He also concluded extratropical air masses form between two air masses. Information can be
found in the section Storms Are Variations in Large-Scale Atmospheric Circulation