Prior to plate tectonics, the evidence for continental movement was intriguing but puzzling. Codebreaker Worksheet Students are introduced to QED earthquake data. This lesson also demonstrataes a method for approaching large, complex data sets. String Plotter Activity Teamwork allows students to plot epicenters efficiently. As students repeat this exercise at weekly intervals, distribution patterns emerge.
S waves require a semi-rigid medium.
P waves can traverse solids, liquids amd gases. STS issues arise naturally. Ocean Sounding Reading Early efforts to chart ocean depths relied on cables and weights. Brings together the need for ocean-depth data with students' increasing knowledge of waves. Great circle routes are often shorter than others.