Design and Technology KS2: How is dry ice created?
Presenters Lauren Layfield and Joe Tracini and The Dengineers team help Kiran from Coventry create a witchcraft and wizardry den.
The den will have an area for mixing potions, using dry ice to create a mysterious and smoky effect.
They demonstrate how dry ice works, as a solid form of carbon dioxide with a surface temperature of -78 degrees Celsius.
They explain that normally when heating an object, such as an ice cube, it will transform from a solid to liquid before turning into a gas.
But dry ice is so cold it heats up really quickly and misses out the liquid state in the middle turning straight into gas. This process in called sublimation.
This could be used to introduce the process of design, and as a prompt for class discussion and learning in areas such as initial research, designing and making a structure.
Pupils could investigate a variety of materials, checking to see if they turn from a solid to a liquid to a gas when heated up.
They could explore the idea of sublimation, why do some materials, like dry ice, go straight from a solid to a gas?
This clip will be relevant for teaching Design and Technology at KS2 in England, Wales, and Northern Ireland and 1st and 2nd level in Scotland.