Select all that apply. a hypothesis is always correct determined before experimentation begins the experimental factor that changes in response to a change in the independent variable testable and falsifiable

I believe a hypothesis is determined before experimentation begins. A hypothesis is a scientific state of prediction. It describes in concrete terms what you expect will happen in ones study. However, not all studies have hypothesis. Often times a study may be designed to be explanatory. A study may have one or more hypothesis. Hypothesis is an educated prediction that can be tested.

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.