A small piece of dry ice is placed in a test tube, which is stoppered. As the dry ice sublimates, the pressure inside the test tube becomes too great for the stopper to contain, and the stopper flies off the tube. Another piece of dry ice is placed on a quarter. When pressure is applied to the dry ice, it causes George Washington's teeth to chatter, producing a delightful high-pitched squeal, much to the delight of the kids.
Demo Pack includes: 1 16mm x 150 mm test tube, 1 #1 solid stopper.
Study Group Pack includes: 4 16mm x 150 mm test tubes, 4 #1 solid stoppers.
Classroom Pack includes: 10 16mm x 150 mm test tubes, 10 #1 solid stoppers.
Party Pack includes: 144 16mm x 150 mm test tubes, 144 #1 solid stoppers.
Find the Lesson Plan Here