Discover facts about the Earth in motion in this volume in the "Bright Sparks" series - from earthquakes and volcanoes, to mountain building and crustal plates. "Bright Sparks" are introductions to a wide range of topicss from animal camouflage and minibeasts to land and flying machines, the Earth, weather and lots more. The books contain nine spreads, each focusing on a different aspect of the topic covered, and each with a true-or-false quiz question.