In an air mass, what two characteristics are relatively the same?

In the context of air masses, temperature and moisture are the two characteristics that are relatively uniform throughout the air mass. An air mass is a large body of air that has similar temperature and moisture content at a given altitude. This uniformity occurs because the air mass originates from a specific source region, such as over oceans or land, which contributes to its particular thermal and moisture properties.

When air masses form, they acquire the characteristics of the surface beneath them over a significant area. For instance, a maritime tropical air mass formed over warm ocean waters will be warm and humid, while a continental polar air mass formed over colder land areas will be cooler and drier. This commonality in temperature and moisture allows meteorologists to predict weather patterns and understand the behavior of the air mass as it interacts with other atmospheric systems.

The other options focus on different atmospheric concepts that do not share the same level of homogeneity as temperature and moisture in air masses. For example, pressure can vary within an air mass due to local weather phenomena, and while dew point might relate to moisture, visibility is influenced by many other factors and does not directly relate to the characteristics of an air mass. Wind speed and direction fluctuate greatly based on numerous factors, including geography and the presence of