Diagram of the water cycle - labelled diagram. This exercise is for students in 1st, 2nd, 3rd, 4th, 5th, 6th and 7th grades. This is an interactive diagram showing the processes involved in the water cycle. Children can learn the different stages water goes through from when in rains, to when it becomes runoff, then into reservoires where it gets heated up to evaporate as rain once again. This is an interactive online water cycle worksheet which students can use to learn directly only. Keep playing until you master all the processes in this essential geography skill.