The document is an interactive software simulation about water and the water cycle. It presents the user with multiple choice questions to test their knowledge. If they select the right answer it confirms it's correct, and if they select the wrong answer it acknowledges they didn't know that before. It covers topics like the composition of water on Earth, where rain comes from, and the hydrological cycle. The goal is to educate users about these key aspects of water and the water cycle in an engaging, game-like format.