naked egg

I'll try to post more of what our days are like in our unschooling adventures. Too many pictures, I realized I am very behind... But here's our lesson on osmosis and reverse osmosis!

We started our experiment with two raw eggs. Egg A and Egg B. Both were dropped into a cup full of white vinegar. As the calcium carbonate dissolved away, both eggs were left "naked" in their outer membranes. Osmosis already occurs with the vinegar because most of vinegar is made of water. The water made its way into the eggs and made the eggs huge. That was not enough though. We had to make the most out of them!

EGG A. To further demonstrate osmosis, we poured out the vinegar and put it in red food coloring.

My kids loved the red egg LOL. We decided to see if osmosis indeed made the egg red outside and inside. So we boiled it ;) and dissected it. We even have a video! The egg was so full of water, the egg white never became completely solid, but you can see, it's pink! The yolk maybe was too dense for the little red coloring we put in so it stayed yellow. 

EGG B To learn more about osmosis, we put egg B into syrup. The syrup made it possible to show the kids reverse osmosis by taking water out from the huge egg! It shrank and was not able to bounce. 

That was fun, but we had to put it back in the water and blow it up with osmosis again!!! So we did. Look! hahahaha When we broke the outer membrane, water just came gushing out. One peculiar thing we discovered what that the yolk, even though we had not cooked it, was solid. Texture was of a gummi bear.

 Here's an extra video of the bouncy naked egg A.