My group chose to test how the weight and size of a paper airplane affects the distance it travels. We believed that the lighter the airplane was, the farther it would travel. Our hypothesis was rejected when we found that the size 1/2 airplane travelled the farthest instead of the size 1/4 airplane. This may have been because the 1/2 plane was light enough to accelerate fast but heavy enough to still keep its momentum. Next time, I would choose a more open area because we had to redo some trials due to the airplanes hitting the walls. This made the tests less accurate as the tips would get bent.