After learning about the properties of water early in the term, and then comparing fresh water with salty water later in the term, Grade 5/6 were presented with a hypothetical: Imagine you have been in a terrible plane crash and are now stranded on a small tropical island. How could you separate the salt out of the ocean water so that you won't die of thirst before the rescue plane arrives? You may only use items that would be found on your little beach or in the wreckage of the plane. The student quickly worked out that the best way would be to use heat to force the water to evaporate, leaving the salt behind. They showed some excellent problem solving skills and critical thinking to find ways to trap the steam and collect the fresh water as the steam condensed back into liquid water.
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February 2022
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