As the days have passed, both of the eggs went through a lot of physical changes. In the beginning, both of the eggs were submerged in vinegar. They were submerged in vinegar to soften the shell, or to make the egg's shell permeable. Then, one egg was submerged in water and the other in maple syrup. The egg placed in water was to see how the egg was going to react during the process of osmosis.
Osmosis is diffusion involving water.
The other egg that was placed in syrup was to see how the egg was going to react during diffusion. Diffusion is the process when particles move from areas of high concentration to areas of low concentration. On day 3, the purpose was to see the eggs' end result through osmosis and diffusion.