This Blog's History: The Magic Ketchup Experiment

This Friday in This Blog's History I return you to the Magic Ketchup Experiment.  In this experiment the goal is to make a small packet of ketchup (or mustard, hot sauce, soy sauce, etc.) to rise and sink in a two liter bottle of water.  The key is density.  When the density of the packet is greater than that of the water, the packet sinks.  When the density of the packet is lower than that of the water, the packet rises.  The trick is figuring out how to get the densities to change in the same experiment such that the packet rises then sinks then rises then sinks, over and over again.  So how is this done?  That's where you need to check out the original post.

The Magic Ketchup Experiment