During this period of physical distancing, the Geo Centre team would like to maintain our social connection with our visitors.
We have created this page to share simple science activities that parents can do with their children at home!
We will be uploading activities here weekly, so stay tuned and feel free to tag us on Facebook and Instagram!
In this activity, you will experiment with how salt melts ice!
For your ice block:
– toy dinosaurs, stones, shells, plastic crystals, etc.
– large container
For your experiment:
– salt coloured with a few drops of blue food colouring
– a shaker container for the salt
– small pate spreaders
– plastic test tubes
– turkey baster
– bowl of hot water
Salt works by lowering the freezing point of water. When sprinkled on ice, it makes a brine with the film of surface water, which lowers the freezing point and starts melting the ice that the brine is in contact with- to a point. The lower the temperature, the more salt you need, so it is less useful below -10C (15F).