Experience Gravity Free Water

This group's reading activity was to fill a glass right to the top with water, then place a piece of cardboard over the mouth of the glass, making sure that no air bubbles entered the glass.
Then holding the piece of cardboard, they turned the glass upside down and took away the hand holding the cardboard.
Look what happened

The cardboard and the water stayed put even though the cup of water was upside down. Some of us had to have a few attempts to get it to work.

So Why Did This Happen?
With no air inside the glass, the air pressure from the outside of the glass is greater than the presure of the water inside the glass.  The extra air pressure manages to hold the cardboard in place, keeping us dry and the water where it should be, inside the glass.