Students will observe that movement of the solute in the solvent increases the rate of dissolving, as compared to the control. Students will observe that the solute, when broken into smaller parts, will dissolve in the solvent faster, as compared to the control.
Students form groups of three.
First, the recorder folds a piece of paper in half, from top to bottom. The top half is used to record predictions, the bottom half is to record observations. He writes the members' names in the first column, in both top and bottom halves, one name per row. Taskmaster makes sure all procedures are followed. He may do everything himself or delegate jobs to others.