Grade 6–8—The concepts covered in these titles support the National Science Educational Standards. Both books open with an introduction, which is followed by six chapters of text. The small but outstanding color photographs add to the information and will attract students. Hantula includes material on how rocks are formed, their various types, and how the Earth continues to change through erosion, faults, landslides, earthquakes, fossils, extinction, and the movement of continents. Tables of popular gemstones, diagrams of the rock cycle, maps, and short biographies of scientists James Hutton, Nicolaus Steno, and Louis Agassiz are helpful additions to the general text. However, more detailed information for the same age group may be found in John Farndon's e.
