In Rocks, young readers discover rocks form when magma (molten material) inside Earth cools. The three main types of rock are igneous, sedimentary, and metamorphic. Each type of rock is defined. Geologists study the features of rocks and do tests to classify them.
 
Softcover, 8×8 in., 24 pages
Word Count 210,  Lexile Measure 680L
A pronunciation guide is included. Reading Level 1-3, Interest Level 2-5.