human
Please provide information about the water cycle.
assistant
The water cycle is the continuous process in which water moves from the atmosphere to the surface of the Earth and back again. It is driven by evaporation, which occurs when the sun heats up liquid and vaporizes it into the atmosphere. The water vapor then condenses into clouds, which are moved around the atmosphere by wind. When the clouds reach areas of lower pressure, the water vapor condenses and falls back to the surface as precipitation. This precipitation can come in the form of rain, hail, sleet, or snow. The water that falls to the Earth's surface is called runoff and will find its way back to the ocean, lake, or river. The water then evaporates again, beginning the cycle all over again.