Earthquakes, tsunami, P and S waves graded task

This is a GCSE graded task sheet on earthquakes, tsunami, P and S waves designed for independent learning. Students play the role of a geological scientist working for company that is designing an earthquake detection system. They need to put 10 detectors around Japan and explain as part of a Dragons Den pitch how they can detect a tsunami. There are differentiated websites provided for research. Please leave feedback to how this is useful or how it can be improved.