Read all about petrology in Super Simple Rock Cycle Projects. Kids will learn about different types of rocks and how they can change over time. Discover how scientists study rocks to learn about Earth’s history. Then, build a sediment jar, make eggshell geodes, and more. Each project has color photos and easy‑to‑follow instructions. Aligned to Common Core Standards and correlated to state standards. Applied to STEM Concepts of Learning Principles. Super Sandcastle is an imprint of Abdo Publishing, a division of ABDO.