"Set off on an adventure 4.6 billion years in the making with Geology for Kids. Start at the red-hot center of Earth and learn about each layer until you reach the rocky crust. Discover how mountains, valleys, and oceans form, and uncover secrets about the planet you call home. (Did you know that only 20% of deserts are covered by sand, and some can be blistering cold in the winter?) Geology for Kids is jam-packed with facts, illustrations, and photos...