Weather Basics

1. vapor, the invisible gaseous state of water in the atmosphere.
2. a narrow zone of transition between air masses that contrast in temperature and/or humidity.
4. front, the zone where a faster moving cold front overtakes a slower moving warm front, causing the warm air to be completely lifted off the ground.
6. mass, a large body of air with similar temperature and moisture characteristics throughout.
8. the atmospheric conditions at a particular time, day to day.
10. humidity, the ratio of the amount of water a volume of air holds at a particular temperature compared to how much water the volume of air could hold at that same temperature.
12. the transfer of heat by vertical movements in the atmosphere as a result of density differences caused by heating from below.

1. front, the zone where a warm air mass advances and meets a cold air mass, rising over the denser cold air.
3. the measure of the average motion of molecules.
5. relating to mountains.
7. front, the zone where a cold and warm air mass meet, but neither one has enough force to move the other.
9. pressure, the force of the atmosphere above a given point.
11. front, the zone where a cold air mass advances and meets a warm air mass, pushing up the less dense warm air.