I'm going to tell you about the scientfic method. Do you know the order of it. Well it is first you ask a question like will this work then you make observations then you from a hyppothesis and then you test the hypthesis then after that you analyze the resulsts then draw observations and the last thing is communicate results. A hyothesis is an explaatin that is based on prio scientific reaserch or observations and that can be tested. A controlled expirment is an experiment that tests only one factor at a time by using a comparison of a control group with an expirmeental group. There is also a variable in a hypthesis, A variable is a factor that change sin an expirment in order to test a hypothesis.