Balloon hovercraft

B E G I N N I N G	TITLE	Balloon Hovercraft
	QUESTION	How does a hovercraft hover?
	HYPOTHESIS	I predict that it will go straight up in the air.

M I D D L E	EQUIPMENT  AND MATERIALS:	Bottle Cap, disc, balloon.
	PROCEDURE:	Step 1: Glue the bottle cap over the CD hole. Step 2:  Blow up the balloon. When it is fully inflated twist the end so no air comes out. Step 3: Stretch the balloon over the end of the bottle cap. Step 4: Open up the cap and place the CD on the surface. Step 5: Untwist balloon and let go.
	OBSERVATIONS/RESULTS:	It slid across the table.

E N D

CONCLUSION:

The air from the balloon creates a cushion of moving air between the disc and the CD and reduces the friction across the surface.