Need ideas on this homework assignment for 8th grade

Question

design an experiement where you create a testable question, identify control variables, independent variables, and dependent variables, come up with a hypothesis and the steps of how you will carry out the experiement.

Answer 1

freeze hot water and cold water in seperate containers and figure out which freezes first. I got an A-

Answer 2

Try this link, it has tons of ideas.  http://chemistry.about.com/od/sciencefai...