Kit Lesson 1:Thinking about Land and Water
Earth is composed of land (studied by geologist) and water (studied by hydrologist). Water covers 73 percent of earth’s surface, 97.2 percent is salty ocean and 2.8 percent is fresh (glaciers, groundwater, lakes, streams and air). Landforms (mountains, plateaus, plains) and water meet causing land to change through natural processes (erosion,sedimentation).