Blowing up balloons can be quite the task. You’ll spend a ton of time huffing and puffing while blowing your breath into the rubbery orb. Don’t waste all of that time and energy making yourself light-headed! Try dropping a small piece of dry ice into a balloon instead, and watch what happens.
Try changing these factors for even more science fun:
When dry ice is exposed to warm air, a gas called carbon dioxide (CO2) is produced through a process called sublimation. This is because dry ice is frozen carbon dioxide, and it needs to be really, really cold to stay frozen. The balloon inflates because the carbon dioxide gas takes up lots of space, eventually filling the space inside and making the balloon stretch out.
Careful, though! If you drop a piece of dry ice into the balloon that’s too big, the balloon might explode from the pressure. That’s why it’s very important that you stand at a safe distance while the dry ice is subliming.
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