100 Secrets of Planet Earth

Many scientists – geologists and geographers, physicists and astronomers – are still grappling with the mysteries and enigmas of our planet. Some riddles have already been solved, while others still require effort. This book will explain how our Earth is structured, why mountains grow, why tsunamis and volcanic eruptions occur, when ocean currents began to be studied, what the biosphere is, and where continents drift. You will also learn about the different types of clouds and what causes thunderstorms, how sailors used bottle mail, and why islands, peninsulas, continents, and parts of the world have their names. For middle school age.