We were learning about floating and sinking in P5A. First we investigated whAT THINGS FLOATED AND WHAT THINGS SUNK. We learnt about buoyancy, upthrust and gravity and how the density of the material affected the buoyancy. Afterwards we designed boats thinking about their size and shape. We ran a fair test as we each used the same size of tinfoil. We predicted how many pennies our boats would hold . Then we tested the boat design and recorded how many pennies it held before sinking.

I found out that sometimes it is the shape and size of the boat that effects the buoyancy. Our small boat held 21 pennies but we had predicted that it would hold 10 (Ruari). It was so much fun making and testing our boats (Kai).