Igneous Rock Activity
In talking about igneous rocks, we looked at the cards from teacherdesk.info and talked about how some lava cools quickly (like obsideon) and some cools slowly (like granite). Melting wax from a candle was like lava cooling quickly and after the wax had cooled for a few moments we felt how smooth it was and compared that to the obsideon rocks we have from the rock kit. You might also...