So, geomorphology is just a big word to describe the study of the landscape around you. When you look at the world, it’s fun to try and figure out the forces that operated on the land and created what we see today. Water, wind, ice and volcanoes all serve as sculptors of the earth. After a mountain building episode in geologic history, those forces begin right away to erode the softer layers and create the landforms that make up our daily lives.
Some valleys are carved by the slow moving grind of ice as glaciers advance and retreat.
Look around you and throw out some ideas on how your world was shaped. Local libraries have geology reference books for your area. Many of them are written for folks with no training in geology too!