Testing water resistance

This afternoon in science we tested whether or not our boats would float. In teams we worked together to create our boats , using plastic bottles, and other  materials. Most of our boats floated but one which had holes in the bottle started to sink. So as a class we discussed how we could improve the boat and came up with the solution of covering up the holes, which would help the boat float as no water could get inside.

Whats the best material to make a boat with?

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