In this easy, one day lab, students will explore a mixture and two solutions. They will find the mass of each substance before mixing it. Upon mixing the ingredients for each mixture or solution, they will then find the new mass. They'll soon discover that simply making a mixture or solution will not change the mass! Included in this PDF is a cute and organized interactive notebooking INPUT AND OUTPUT. The output requires students to summarize the day's activities and synthesize all in one! My students love this lab and especially using the pan balance and gram weights!