Ages 7 to 14 years. When the earth shakes beneath your feet, the result can be dangerous and deadly. This book traces tremors and seismic waves and explains how we have prepared for the unexpected quakes that rock our cities and countryside. Special mention is made of: the science of earthquakes, including earth's layers, plate tectonics, and major fault lines; types of seismic waves; technology used for forecasting, predicting, and measuring earthquakes; devastation from tsunamis, landslides, and fires cause by earthquakes.