What is this experiment about?
NASA has a long history with the bubble. In space it is necessary to keep liquids from freezing, and sometimes it is necessary to keep liquids boiling. To keep liquids from freezing, heating elements are submerged and voltage is applied. The heating element maintains the temperature of the liquid and keeps it from freezing. The bi-product of this heating are bubbles.

In microgravity bubbles form just like they would on Earth, but in microgravity they act much differently. Earth creates a gravitational force that causes bubbles to move to the top of the liquid it is in. The force that causes bubbles to rise is the buoyancy force. In microgravity however we do not have the luxury of the buoyancy force. When a bubble is created in microgravity it does not rise to the top of the liquid. A bubble will most likely stay attached to the heating element.