Crystal Star

Rosemary made the star first. She had to carefully dissolve the borax and food colouring in the hot water. She then placed the star into the jar of borax mixture. Now it is the waiting game. We still have to have a look to see if a crystal star has formed. We predicted that the same process of evaporation would happen just like Michelle, Ryan and Malachi's crystal experiment. The only difference is that the others use a shallow dish or mirror and Rosemary used a jar. We decided that it would take longer for crystals to form as it was take longer for the mixture to evaporate. We will make another post when we have checked Rosemary's mixture.

What's happening with the Crystal Extravaganza?

The water from the plates evaporates into the air and turns into water vapour - tiny particles of water that are spread so far apart that they are like a gas. Leaving the plates in a warm room speeds up the evaporation. Once the water has evaporated, only the crystals are left.