This is a comprehensive and student-friendly power point about rocks. It describes properties of rocks and explains the formation and characteristics of three kinds of rocks: igneous, sedimentary, and metamorphic.
Moreover, the power point features (talks about characteristics and interesting facts) the following rocks from each group: granite, basalt, obsidian, pumice, sandstone, conglomerate, coal, limestone, shale, marble, quartzite, and slate.
I have included tons of quality pictures and