Following on from yesterday's oil experiments, Jasmine and I moved on to displacement today, in our bid to satisfy her scientific thirst. We sought out some objects and talked about sinking and floating before making a table on to which Jasmine would record her hypotheses regarding which items would sink and which would float. This was great writing practise, though I will have to teach her how to use a ruler next time!
Once the table was filled in, we took our objects to the bathroom where Jasmine dropped each one into the bath, which I had filled with water.
About halfway through our experiment, Jasmine looked up and said, "I think the weight of the object is what makes it sink." This led to a discussion on displacement and Jasmine's confidence grew to the point where she declared, "I can look at any object now and know whether it will sink or float!
|Hypotheses and results|
She had lots of fun with the stacking cups that we always use in the bath - it fascinated her to watch them float, then slowly fill with water before sinking gently to the bottom of the bath.
This activity was great fun, particularly for Jasmine. I think it's a good one to do with all preschoolers, even if they haven't shown any specific scientific interest. It introduces cause and effect and, at the very least, offers a great base for water play!