You could consider a glacier to be a frozen river, and like rivers, they "move" downhill, erode the landscape, and go water alongside within the Earth's water cycle. Like evaporation, condensation can also be influenced through the Sunshine. As water vapor cools, it reaches its saturation Restrict, or dew point. https://watercycle69124.wikifrontier.com/6655637/water_cycle_video_fundamentals_explained