Carefully review the general safety advice on the back of the box cover before starting the experiment.
Observe safety precautions when working with boiling water.
Disassemble the setup after the experiment.
Dispose of solid waste together with household garbage.
Liquid water in an open vessel gradually turns into gas and flies away in a process known as evaporation. Hot liquid evaporates more quickly than cold liquid , which is why you can even observe the steam rising from hot drinks with the unaided eye.
Typically, steam rises from water because evaporating into the air is easier than into the liquid or the vessel in which it is located. But if you heat water to a certain point, it begins to evaporate so intensely that it starts to evaporate inside itself—to boil. The bubbles in boiling water are made of steam .
How intense the evaporation must be for the water to boil depends on air pressure . By lowering the pressure , you make it easier for water to boil, and it begins to do so at a lower temperature than it does at atmospheric pressure.
Dozens of experiments you can do at home
Kids are now able to engage with science in a way that they simply wouldn’t have been able to in the past as they shrink themselves down to see the world at a molecular level