This hands on activity will get your students up and out of their seat! Print out the cards on card stock, cut out each domino and laminate if possible. The rocks and minerals vocabulary included are: mineral, streak, metal, sedimentary, intrusive rock, inorganic, density, nonmetal, sediment, clastic rock, crystal, cleavage, gemstone, metamorphic, organic rock, luster, fracture, rock, rock cycle, chemical rock, hardness, ore, igneous, extrusive rock, metamorphism. Students mix up the cards and match the word to the correct definition. Start with the Start Star and watch the kids have a ball! There are two sets of vocabulary dominoes. They are the same except for one set has a picture to accompany each definition. The other set can be used as an answer key.