Dry Ice

I like to do something fun with the boys on their last day of school.  Usually we do a picnic and play at a park.  This year I suggested putt-putt golf or bike riding on the river.  Isaac wanted to buy some dry ice and do science experiments, so that is what we did!  We found out you could purchase it right at Hy-Vee, and the boys talked me into a 7.5lb block.  We played with it ALL afternoon, and still had enough left to blow up a few bottles the next day.

















One of my favorite experiments was making the vapor bubbles.  You put some soap in water and then drop on your block of dry ice.  The bubbles that come out are opaque and disappear into smoke when you pop them.  So cool!



Here the kids are trying to float a bubble on top of the CO2 gas.  CO2 is heavier than air, so the bubbles should float on top.
















Here are the boys with one of our busted water bottles.  Their favorite experiment was filling a bottle with dry ice and water, and then watching the bottle explode when the bottle filled with gas.  It made such a loud bang, and they giggled every time!