A bit late editing this together but here’s a few videos of our scientific enquiry into plastic bottle rockets and how they fly. The questions that our thinking groups were investigating were:
Does the shape of a bottle affect how far a bottle rocket travels?
Will a smaller bottle rocket go further than a big one?
Will adding aerodynamic features make a bottle rocket go further?
Does the amount of water affect how far a bottle rocket travels?
Does the angle of the launcher affect the distance a bottle rocket travels?