In the last blog post we saw how honey, oil and water can be made into a mixture but will eventually separate out thanks to the difference in the density of the three fluids. Just as liquids have different densities solids too have different densities, and in this science experiment we are going to explore the different densities of a few small solids in the same mixture bottle which we made last time.

Set the bottle with the honey, oil and water mixture before you and wait till the three fluids settle into three distinct layers. Next get your hands on a wine bottle cork, a small coin and a grape. One by one you will add these three solids into the liquid bottle. You will find that the different densities of the solids will ensure that they sink through some fluids but float in others. In fact each of the three solids will find their way in to each of the three separate fluid layers.

Another way to display the different densities of liquids is by using vinegar and oil. Both the fluids are different densities and the oil will always settle down on top of the vinegar layer. You can add them and mix them but as soon as you leave the bottle and allow it to stand still they will come to rest in two layers. Try more science projects here.