Seen from space the Earth looks deceptively serene, but it's a violently dynamic place. Its rocky surface frequently experiences earthquakes and volcanic eruptions. The Earth us not just an inert body - it is a continuously operating machine that harbours life. This multitouch book provides an introduction to the theory of plate tectonics, and offers a range of interactive activities, videos and quizzes to help you explore how the movement of the planet's outer rocky layers create, destroy and modify its surface. A student at A-level, International Baccalaureate, or K-12 level will be stretched by this content and teaching. If in doubt, download the free sample.