Boom! A volcano erupts in the distance with thick, orange liquid flowing down its slopes. As time passes, the lava hardens and cools into a solid rock. But what type of rock is it? Learn all about incredible igneous rocks, including how they form, what they're made out of, how they're used, and more. A final science lab activity engages young readers to get creative with what they've learned. It's a rockin' good time on Earth!