This week we have been investigating reversible changes. We started with golden crystals and watching them expand in the water. But will they reverse back if we leave them out of water? The class say no. We will observe over the next week and see! Then we did a 'Hide The Gold' dissolving golden crystals investigation. Each group investigated a different factor about dissolving to see how we could speed up the process. Great investigating skills! Next Tuesday  we are going to be creating a golden fountain and make some of our own explosions! Wish us luck!