In this week's Homeschool Science Corner, we are going to look at the three main types of rocks - igneous, sedimentary, and metamorphic. Each of these is composed of different minerals found in the Earth's crust and core. We are also going to discuss crystals a bit, since they are made out of minerals as well. This post is in no way meant to be an exhaustive look at this subject, rather it … [Read more...]