less

more

warmer moist

decreases

clouds

cools down

condense

The lighted match provides ash (dust) for the water vapor to condense upon.

Types of Air Masses (1min 9 sec)

H

High,

Happy Heavy H “air”y

L

Low Light LousyL “air”y

https://docs.google.com/a/teachers.wlcsd.org/file/d/0B1Q1-52rvXAYY2hZU2JjOXhBcEk/edit

Air Mass Boundaries – Front (49sec)

https://docs.google.com/a/teachers.wlcsd.org/file/d/0B1Q1-52rvXAYdVNJb1B4eVhuWTQ/edit

Cold Front Video Clip (1min 30 sec)

https://docs.google.com/a/teachers.wlcsd.org/file/d/0B1Q1-52rvXAYUlJ0clp2V3FST0U/edit

Warm Front Video Clip (1min 40 sec)

More Animations of Fronts

http://glencoe.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::430::356::/sites/dl/free/007877828x/164155/515_Fig_11.swf::Fronts

http://www.classzone.com/books/earth_science/terc/content/visualizations/es2002/es2002page01.cfm?chapter_no=visualization

Hurricane Sandy

Hurricane Katrina

Hurricane Katrina

Hurricane Sandy