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Thursday, 15 August 2019

scientific writing


TITLE
Balloon Hovercraft
QUESTION:
How does a hovercraft hover?
 HYPOTHESIS

I predict that the balloon Hovercraft  is going to stay on the table because  it has no air pushing it up .

EQUIPMENT AND MATERIALS:
We need a cd water bottle lid and a balloon .

PROCEDURE:
Step 1: Hot glue the bottle cap over the cd hole.
Step 2: Blow up  a balloon .  When it is fully inflated  twist the end so no air comes out .
Step 3:  stretch  the balloon  end over the bottle lid.
Step 4: Open up the cap and place the cd on a table.
Step 5: Untwist balloon  and let go .

OBSERVATIONS/RESULTS:
I found out that the hovercraft made a cushion of puff between the table.

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


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