The document discusses the water cycle, which is also known as the hydrologic cycle. It has no starting or ending point. The cycle includes evaporation where water in bodies of water is heated by the sun and turns to vapor, condensation where water vapor in the air cools and condenses to form clouds, and precipitation where clouds become too full and release water in forms such as rain, snow, hail, and snowflakes. Tables and examples of different types of precipitation are also included.