Ask students if they think the coating will dissolve in water. Give each student an Activity ... Do not swirl or stir. Observe for about 2 minutes. Show the animation Dissolving an M&M. Explain that ...

Give each student an Activity Sheet ... and alum is to do a water cleaning test. Have three students add ½ teaspoon of salt to its labeled cup, ½ teaspoon of sugar to its cup, and ½ teaspoon of alum ...