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.
Don't miss our free 3 Types of Rocks worksheets that I made (when we studied rocks a few years after I wrote this post). There are also a lot of hands-on activity ideas in that post.
I shared some of our hands-on activities in these related posts:
- Igneous Rock Activities
- Sedimentary Rock Activities
- Sedimentary Rock Activity (much older post, using sand)
- Metamorphic Rock Activities
- Metamorphic Rock Activity (another older post, where we took “core samples,” excavated and examined this baked rock — a cupcake!)
- Minerals: Our Hands-On Activities and Seeing the BIGGEST Diamond in the World
- Earth-Space Science: Topographic Maps
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