Department of Earth Science |Northeastern Illinois University

ESCI 121

Section 06
Fall 2009

Daily Objectives #25 (December 3, 2009)                                                                                                         Dr. Sanders

By the end of today's class, you should be able to do the following:


w   Review, plus one new concept: Explain how  temperature and moisture content of an air mass affect its density.

  Review:  Describe continental polar (cP), maritime tropical (mT), continental Arctic, (cA), and other air masses that affect the continental United States.  (See and .)

w   Complete the data collection and analysis of the "Weather Tracking Day 1" worksheet, and compare your CONCLUSIONS with the rest of the class.
w   List the steps that lead to the formation of a cloud.

w   Explain the terms condensation and condensation nuclei as they relate to cloud formation.

w   Describe the characteristics of cirrus, cumulus, and stratus clouds. 

w  Tell what cumulonimbus and nimbostratus clouds have that ordinary cumulus and stratus clouds don't. 

w   Explain the processes that lead to orographic, convective, and frontal precipitation, and sketch a diagram illustrating each one. 

w   Make a sketch of a warm front and use it to explain why precipitation is associated with these fronts. 

w   Make a sketch of a cold front and use it to explain why precipitation is associated with these fronts. 

w   Explain the meaning of air pressure / barometric pressure

w   Move on to "Weather Tracking Day 2", using the map linked here.  Today, the focus is on high and low pressure systems and how they relate to fronts and precipitation.

Here's a cool weather site for anyone, but especially for you pre-service teachers!

Department of Earth Science | Northeastern Illinois University

Copyright 2009 Laura L. Sanders.  Last updated December 3, 2009.