Air Masses

2. a huge body of air that has a similar temperature, humidity, and air pressure
7. the boundary where air masses meet
8. the prevailing westerlies push air masses in the US from _____ ___ ____
9. Maritime polar air masses are ___ and ___
11. a __ front forms when a warm air mass gets caught between 2 cold air masses
12. Continental tropical air masses are ___ and ___
13. a swirling center of low air pressure can form a __
14. Continental polar air masses are ___ and ___
15. a ___ front forms when a fast-moving warm air overtakes a slower moving cold air mass
16. an air mass is ___ if it forms over water

1. the characteristics of an air mass depend on the temperature and ____ of the region over which it forms
3. a __ front forms when a cold and warm air mass meet but neither can move the other
4. In a(n) ___ winds spiral outward from the center, moving toward areas of lower pressure.
5. the ___ stream is a band of high speed winds about 6-14 km above Earth
6. a __ front forms hwen a cold air mass runs into a warm air mass
10. Maritime tropical air masses are __ and ___
12. an air mass is ___ if it forms over land