Ever wonder what those rocks that fly out of volcanos are called and how they are formed? This kit will reveal those secrets. You will learn what causes obsidian to become pumice, how ash is welded into a rock, and why some eruptions produce mountains that are thousands of feet high while others produce lava flows that are thousands of acres wide. Classroom Kit includes materials for 10 lab groups to perform each activity, along with a Teacher's Guide.
Volcano Mania! Classroom Kit