Water is the most important substance on Earth. Water dominates the surface of our planet, changes the face of the land, and defines life. These powerful, pervasive ideas are introduced here. The Water Module consists of four investigations in which students explore properties of water, changes in water, interactions between water and other earth materials, and how humans use water.

The Water Cycle from BrainPop
Over 200 experts in many fields will answer students' questions.