Lava Lamps--1st period

Lava Lamps--1st period

 
Picture of Ben Gericke
Lava Lamps--1st period
by Ben Gericke - Thursday, 8 November 2012, 7:33 AM
 

As you look at the lava lamps sitting on the front table...explain how the movement of the "lava" occurs.  Notice one has no movement and the other does.