What’s going on? A heuristic

• A conceptual physics-based foundation• A vortex is circulating air.• If there is a low pressure system on Earth in

the northern hemisphere then air circulates counterclockwise around the low.

A vortex

http://commons.wikimedia.org/wiki/File:Rotational_vortex.gif

Low

A vortex and a ball

http://commons.wikimedia.org/wiki/File:Rotational_vortex.gif

http://i206.photobucket.com/albums/bb194/Dantejfisher/RollingBall.gif

Low

Try to roll the ball towards the vortex

A vortex and a ball

http://commons.wikimedia.org/wiki/File:Rotational_vortex.gif

Try to roll the ball towards the vortex

http://i206.photobucket.com/albums/bb194/Dantejfisher/RollingBall.gif

Low

• Vortices are boundaries or separators. • Air inside of vortices often takes on distinct

characteristics.

Ball rolling experiment

Ball roller and friend

http://24.media.tumblr.com/tumblr_m3q2hkeyJV1r3a6jho1_500.gif