Monday, November 04, 2013

Race a speed boat

Race a Speedboat
Can you make a paper boat race across the water just by gently touching the surface of the water?
Hypothesis
when you touch the dish washing liquid it water it will bubble and make the boat move.
Materials
Coloured card, washing up liquid, pencil or sharpie, scissors, large container of water.

Method
we cut out a shape for our boat then we filled our bucket so it was a quarter fill. Then we but our boat in the water and put a touch of dish washing liquid on our finger and we slowly put it in and we broke the surface tension to  move the boat.




Observation
We put our hand in and broke the surface tension to  move the boat. broke the surface tension to  move the boat.



Conclusion  
We broke the surface tension to make the boat move. The water that didn't break pulled the boat




Short Experiment to Follow Up
Make Metal Float
Gently place a paperclip on the water’s surface.

Hypothesis  
It does float because you carefully remove your hand and it will float but if you don't it will sink.



Observation
It does float because you carefully remove your hand and it will float but if you don't it will sink.

Conclusion  
When Henry removed his hand it broke the surface of the water.


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