Question

air masses

1. how are air masses classified?

a. by the direction they move
b. by their size and shape
c. by weather conditions they bring
d. by the locations where they are formed

1. what factors determine the characteristics of an air mass?

a. the direction it moves
b. the speed at which it moves
c. the weather conditions it brings
d. the temperature and humidity of the air

Explanation:

1. Air masses are classified based on the regions (source regions) where they form. Different source regions (like polar or tropical areas) give air masses distinct properties.
2. The characteristics (such as being cold - dry or warm - moist) of an air mass are mainly determined by the temperature and humidity of the air in its source region.

Answer:

1. D. by the locations where they are formed
2. D. the temperature and humidity of the air