Instructions
Pour each liquid into the glass slowly starting with the sugar syrup ( add food colouring if you want ), followed by the water with added food colouring and finally the vegetable oil.
Drop a few small items in and see which layer they float on.
Do you know why they float on different layers?
Try a marble to see if it sinks to the bottom.
The science part
For a full explanation see this post.
We’d love to see your Christmas themed density jars.
We’ve got lots more fun Christmas science ideas in this post and even have a Christmas ebook available to buy for just $3.
Original article and pictures take http://www.science-sparks.com/2014/12/20/christmas-density-display/ site
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