Using dry ice to make clouds on the stage is to use dry ice to sublimate and absorb heat, so that the water vapor in the surrounding air condenses into water droplets, but the state has changed, which belongs to physical changes.

Matters needing attention

keep

Put dry ice in an incubator: an incubator with good insulation effect can slow down the sublimation of dry ice.

Because the pressure generated by sublimation of dry ice will cause explosion, it is not allowed to store dry ice in a closed incubator.