I designed a boat to show buoyancy. After I designed my boat on a piece of paper I grabbed a piece of tin foil and stared to make my boat. I put it in the water and it sunk but when I put the marbles in it float. It float because when you put the marbles in it is even on each side so for example I made a boat and I put two marbles on each side it will float so it is even. Please leave a comment.
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