Can Rivers Be Made From Slopes and Glaciers?

In my 9th grade class we began to study the formation of rivers. We were allowed to pick two ways that we thought might be the reason rivers were formed. The two that my pod had picked were Slopes and Glaciers. First we began with a hypothesis for slopes. We hypothesised that when it rained that an erosion would occur, which carries the top layer away creating a form of a valley. During the experiment we first propped a tub full of sand that resembles the earths soil and other features then gradually poured water at the top. To our astonishment our hypothesis was true. As the water poured over the sand particles the sand gradually got pulled to the bottom, pushing rocks aside as it went. Which left a path that would eventually develop into a small stream, then over time possibly a river.

For our Glacier experiment we left the box of sand at 6'' high and flattened the sand. We hypothosised that the glaicer would melt and as it melted would begin to slowly move down the hill and grab particles, while leaving a path behind it. After we hypothosised we then took an average sized bowl that had frozen water in it and placed the ice onto the top of the sand. After that we took a heater and heated a glass graduated cylinder on it until the water was nearly boiling, then carefully poured it onto the ice cube. As we observed we noticed how easily the ice melted but how it barely moved. After about thirty minutes of observing the ice had barely moved but was almost gone. We then finished our experiment and concluded that our hypothesis was wrong. Rivers arn't really formed from glaciers. It's possible that a few might be but it would make numerous years before one could begin to be formed.