An introduction to gases that describes how they are different from liquids and solids, explains how gases are created and change, and discusses the different forms of matter.
An introduction to evaporation that uses simple text, photographs, and illustrations to describe the process, discuss the water cycle, and provide instructions for a science experiment.
An introduction to condensation that uses simple text, photographs, and illustrations to describe when it happens, discuss the water cycle, and provide instructions for a science experiment.