Balloon Hovercraft

This week we learnt how to 

B E G I N N I N G	TITLE	Balloon Hovercraft
	QUESTION	How does a hovercraft hover?
	HYPOTHESIS	I predict that the disc will move across the table.

M I D D L E	EQUIPMENT  AND MATERIALS:	CD bottle cap and dvd and 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:	The disc moved on 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.