Gizmo Warm-up Just as some marbles are attracted to one another while others are not, certain molecules stick together more than others. In the Sticky Molecules Gizmo, you will discover what causes this "stickiness." You will investigate a variety of phenomena that result from the attraction of molecules to one another. To begin, drag a dropper bottle of Water and a Petri dish (labeled Polarity) to the simulation area. Drag the dropper over the dish to add water. Examine the molecules. 1. What do you notice about the water molecules?