Welcome back to science! We are continuing our study of the Law of Conservation of Mass and in class today we started by watching a clip from the movie Harry Potter and the Half-Blood Prince. In the scene Harry has a leg up on his fellow potions students due to his heavily annotated potions text book that gives him better instructions to make liquid death! We also modified today's lab testing the law of conservation of mass to get as accurate data as possible. Tomorrow we will discuss out findings and do one last conservation of mass activity before moving into bonding.