Sink and Float

We had a very busy morning discovering why a pumpkin will sink or float. Here are some conclusions drawn by The Soaring Pilots:

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  Maybe the pumpkins are hollow. Maybe the stem will interfere with the floating


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  If it is a big shape (pumpkin) and does not have any openings it will float.


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  I noticed that heavy pumpkins can push water out of the way.


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  A Fairytale pumpkin has a different shape so it balances itself to stay up.


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  I also think that if it is symmetrical it will balance itself but if one side is heavier that side will go down.


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  When you put a rock in a tub of water it will sink because it does not have any air in it.


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  I noticed that it doesn't matter how big the object is it matters if it is hollow or not.


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  I've come to a conclusion that anything with air in it will float.

To read more, check your child's Tuesday folder to see all the documentation on this experiment. Continue experimenting at home, by trying other fruits and vegetables to see if the theory that things that are hollow will float.