We have been combining materials with water to see if they dissolve, sink or react. We investigated how to separate mixtures of materials, including recovering a solution using evaporation. We also found out about reversible and irreversible changes.
Cola and Mentos Experiment
We added Mentos to diet cola and loved the reaction. The Mentos reacted with the cola and created a gas. This caused the fountain of cola and was an irreversible change.