Explore the building blocks of our planet with fun jokes, cartoons and hands-on activities. Find out about the different layers inside our planet. Explore the conditions deep under the surface and how they affect life on Earth. Discover how scientists study underground rocks and how Earth has changed throughout its history. This book is part of the Geology Rocks series. This collection of books examines the Earth's make up, from the different types of rock it is made from to discovering the structure of the planet itself and how tectonic plates relate to earthquakes and volcanoes. Perfect for readers 7 and up.