Many people think they can't observe plate tectonics, but thanks to GPS, we know that Australia moves at a rate of 2.7 inches per year, North America at 1 inches per year, and the Pacific plate at more than 3 inches per year! Scholars...

High schoolers study the San Andreas Fault, calculate its movements, and compare the movements on both sides.  In this earthquake lesson students use the Internet to track movement, and calculate movement using a spreadsheet. 

In this chapter, you will access Global Positioning System (GPS) data from the Plate Boundary Observatory (PBO) and analyze the data in a spreadsheet to measure the motion of GPS stations in the Pacific Northwest. From your analyses, you...