This series for less able readers was written at a lower rading level than the Freestyle version. Each title discusses a different type of rock and its characteristics, as well as Earth's cycles and processes that relate. Titles also explore the makeup of rocks in the form of minerals, crystals, and fossils.
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apatite atom tiny particle cleavage planes colors cooling and hardening crust top layer crystal face flat crystal habit Crystal shapes crystal system crystals are divided crystals Crystals Crystals form deep crystals grow crystals look crystals may form cubic crystals cubic system deep inside Earth diamond Earth's crust top Earth's mantle Earth's surface elements and minerals enters a crystal evaporates turns face flat side form crystals form deep inside form when magma geode groups that crystals grow and fit gypsum halite salt Heat and pressure Hope Diamond hot liquid rock hot melted rock igneous rock jewelry large crystals lattice three-dimensional pattern layer of Earth magma rises mantle hot layer metamorphic rock mineral grows Minerals break Monoclinic Oceanic crust Orthorhombic particle that elements pattern or arrangement pieces of rock quartz crystals rock cycle rock rock formed round rock Salt crystals sapphires sedimentary rock six groups Tetragonal crystals Triclinic type of rock