The document defines several oceanographic and meteorological terms including glacier, tsunami, tide, spring tide, storm surge, and provides brief descriptions of each. A glacier is falling snow that builds up into a large ice mass over time. A tsunami is a large water wave caused by movement of the sea floor or meteorite impact. Tides are the rise and fall of ocean levels caused by the moon. Spring tides refer to abnormally large tidal ranges during a full moon. Storm surge is an abnormal sea level rise along coasts caused by severe winds from hurricanes or cyclones.