Its Just a Phase: Water as a Solid, Liquid, and Gas

In this lesson, students will construct models of the way water molecules arrange themselves in the three physical states. They will come to understand that matter can be found in three forms or phases (solid, liquid, and gas). Using physical models, students will be able to explain the molecular behavior of ice, water, and water vapor. The instructor guide contains detailed background material, learning goals, alignment to national standards, grade level/time, details on materials and preparation, procedure, assessment ideas, and modifications for alternative learners. Educational levels: High school, Middle school