52 projects to explore rocks, gems, geodes, crystals, fossils, and other wonders of the earth's surface
"[Illustrates] 52 simple, inexpensive, and fun experiments that explore the Earth's surface, structure, and processes. This family-friendly guide explores the wonders of geology, such as the formation of crystals and fossils, the layers of the Earth's crust, and how water shapes mountains, valleys, and canyons"--Provided by publisher.
