Week 21 Vocabulary
1) Air Mass  A large dome of air which has similar horizontal temperature and moisture characteristics
2) Air Pressure The force exerted on a surface by the weight of the air above it.
3) Front A boundary or transition zone between two air masses of different density, and thus (usually) of different temperature
4) Humidity A measure of the water vapor content of the air
5) Relative Humidity The amount of water vapor in the air, compared to the amount the air could hold if it was totally saturated. (Expressed as a percentage)
6) Saturated Full of moisture : made thoroughly wet
7) Dew Moisture that has condensed on objects near the ground, whose temperatures have fallen below the dew point temperature.
8) Dew point The temperature to which the air must be cooled for water vapor to condense.
9) Coriolis Effect Force due to the Earth's rotation, capable of generating currents. It causes moving bodies to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
10) Jet Stream Relatively strong winds concentrated in a narrow stream in the atmosphere, normally referring to horizontal, high-altitude winds



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