Which of the following statements best describes the characteristics of an air mass

Question

Which of the following statements best describes the characteristics of an air mass when it first moves into a new region?

A The air mass has the characteristics of its place of origin.

B The air mass has the characteristics of the new region into which it has traveled.

C The air mass has a higher temperature and a lower level of humidity than the region where it originated.

D The air mass has a lower temperature and a higher level of humidity than the region where it originated.

Answer 1

The characteristics of an air mass are acquired in the source region, which is the surface area over which the air mass originates. The ideal source region has a uniform  surface  (all  land  or  all  water),  a  uniform temperature,  and  is  an  area  in  which  air  stagnates  to form high-pressure systems. The properties (temperature   and   moisture   content)   an   air   mass acquires  in  its  source  region  are  dependent  upon  a number   of   factors—the   time   of   year   (winter   or summer), the nature of the underlying surface (whether land, water, or ice covered), and the length of time it remains over its source region