Will the pumpkin float or sink?

Today we did a science experiment on floating. We wanted to see if a pumpkin would float or sink. Prior to this experiment we measured the height, circumference, and weight of our class pumpkin. Before actually measuring, each student had the opportunity to make an estimation. The students have learned that an estimation is a guess. Many of the students got very close and made some really good estimations. The student's estimations about whether the pumpkin would float or sink was very interesting. Many students thought that since the pumpkin was so big and heavy that it would definitely sink to the bottom of the basin of water. In the end most of the students were very surprised to find that the pumpkin did not sink and that it float.