Discover the various types of rocks that exist on Earth with the help of these entertaining printable worksheets on types of rocks! Students in first grade, second grade, third grade, and fourth grade can learn about igneous rocks, metamorphic rocks, and sedimentary rocks with the help of these rock printables. Information on the life cycle of rocks is also included, along with a worksheet showing the cycle. You can start learning with these practical science worksheets for kids by simply printi