Question

1. identify the general air masses over northern america in the diagram to the right.
2. where do moist air masses come from? dry?
3. where do cool/cold air masses come from? warm/hot?

Explanation:

1. Without seeing the actual diagram, common air - masses over Northern America include continental polar (cP) which are cold and dry, maritime polar (mP) which are cold and moist, continental tropical (cT) which are warm and dry, and maritime tropical (mT) which are warm and moist.
2. Moist air masses generally come from over large bodies of water like oceans, as evaporation from water surfaces adds water vapor to the air. Dry air masses typically originate over large land areas, especially deserts or cold regions where there is little water available for evaporation.
3. Cool/cold air masses often come from polar regions or high - altitude areas. Warm/hot air masses usually originate from tropical regions near the equator where the sun's heating is intense.

Answer:

1. Without the diagram, possible air masses are continental polar, maritime polar, continental tropical, maritime tropical.
2. Moist air masses come from over oceans; dry air masses come from large land areas, especially deserts.
3. Cool/cold air masses come from polar regions or high - altitude areas; warm/hot air masses come from tropical regions.