Glacial Erosion

Collect the following materials: ice cube, sand (about 1 spoonful), modeling clay, paper towel, pencil, and paper. Press the ice cube lightly on the flat surface of the modeling clay. Move it back and forth several times. Does anything happen to the clay? To the ice? Place a small pile on the surface of the clay. Place the ice cube over the sand on the clay. Let it sit for about one minute. Pick up the ice cube and look at the surface that had been on the sand. Describe what you see. Place the ice cube back in the same position and move the ice back and forth on the sandy surface of the clay a few times. Remove the ice cube and gently wipe the excess sand off the surface of the clay. Describe the surface of the clay when the sand and ice rubbed it. How would this compare with the surface of the land when rock and other materials are dragged over it by a glacier?

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