Background information for teachers/parents and an activity about earthquake magnitude using spaghetti pasta.

This activity introduces the concepts of weathering and erosion by investigating why river pebbles are often rounded. The download includes background information for teachers and an activity sheet for students. The activity demonstrates the process of erosion using sugar cubes. Participants are asked to predict what might happen (a hypothesis) and then observe what does happen and relate this to the natural environment. A supporting video is available from YouTube.