What would happen if an asteroid hit the Earth and changed its tilt? What if the Earth stopped spinning? Which one of these scenarios would you like to have your classmates investigate and make predictions about? Using materials provided by your teacher and any other teacher approved materials you can gather at home, create a model that explains two of the celestial phenomena you studied in this unit. This model should also allow you and others to make predictions about one of the scenarios/questions above or any other interesting scenarios/questions you can come up with yourself.