There are three major groupings of rocks: igneous, metamorphic, and sedimentary. Igneous rocks form when liquid rock cools and hardens. Sedimentary rocks: Clastic, Chemical, Biochemical or organic. Metamorphic rocks: foliated and non-foliated (or massive). Read More...
The resources above cover the following skills:
EARTH AND SPACE SCIENCE
Plan and carry out investigations that demonstrate the chemical and physical processes that form rocks and cycle Earth’s materials (e.g., processes of crystallization, heating and cooling, weathering, deformation, and sedimentation).