For this scientific investigation you want to find out if a paper airplane, fish tank or science simulation on skateboarding is a good model for a certain parameter of your choosing. Choose which one of the models you are most interested in exploring (only 1 is required, but you are welcome to consider the other two if they interest you). Here are some resources to help you for each type of model. Your goal is to find one testable experiment you can do with the model and then compare that to a real airplane, the ocean or how actual skateboarding works. Will your hypothesis be that it is a good model or poor model for the parameter of your choosing