Amazon.com description: Product Description: Much of Earth is made up of rock, including the continents and even the melted rock of the planets core. Rock is present in all shapes, sizes, and compositions. Readers will learn about the natural processes involved in creating different kinds of rock. Accessible science content that supports the curriculum enhanced by colorful photographs will engage geology enthusiasts and curious minds alike. A simple graphic organizer and fact boxes full of more information add even more excitement for readers.