Google+ Mom to 2 Posh Lil Divas: The Floating vs. Sinking Egg Experiment

Thursday, March 29, 2012

The Floating vs. Sinking Egg Experiment

We have been having lots of fun with Peeps and eggs around here.
The Lil Divas are really into conducting experiments so I thought with Easter nearly here, it was the perfect time to have some fun with eggs along with all of our Peeps. :) 

I started them off with a simple and classic egg experiment - 
The Floating vs. Sinking Egg Experiment

Do you remember doing this experiment as a child yourself? I do!
I LOVE sharing things with the Lil Divas that I myself did as a child.
It's so fun for me to experience it again with them and see their reactions.

What You Need:
2 clear cups/glasses
warm water
2 eggs

1. Fill each of the 2 cups approx. halfway with warm water. 
2. Leave one cup with plain water.
3. In the 2nd cup add 8-10 tablespoons of salt & stir.
(the Lil Divas were very generous with the salt!)

At this point, I had the Lil Divas make predictions about what they thought would happen to the egg when placed into each cup. 

4. Carefully place one (raw) egg into each glass and observe the results.

Of course to be sure it wasn't some sort of egg trickery, the Littlest Diva insisted on taking the "sunken" egg from the plain water cup and putting it into the salt water cup to see if it too would float.....

it did! It also gave me an idea for a follow-up experiment.  ;)

Experiment #2

1. Empty about half of the salt water, leaving the egg in the cup (save it!) and re-stir the salt. We had a lot sitting at the bottom of the cup. 

2. Add fresh water on top of the salt water and observe what happens.

The egg floats in between!
The Lil Divas found this very cool as it seemed suspended in the cup! :)

Now dump out some of the water (leave the egg in), add in your saved salt water and re-stir. What happens?

The egg comes floating back to the top! :)

Have fun sinking & floating those eggs!


  1. Oh, how fun. We will have to try this. We did some floating versus sinking with the plastic eggs, but real eggs will be fun.

  2. Great experiment!! Another one would be to let your egg go rotten.. then it will float too :-) but may be a bit yukky if it breaks!

    Thanks for sharing on Kids Get Crafty!


  3. Definitely a great and fun experiment!

    Thanks for sharing on Kids Get Crafty!


  4. We just saw this on a Popular Mechanics for Kids video and my kids are dying to try it out! Glad to have the ideas of emptying the water and adding fresh again to see what happens!

    1. Tricia, they will enjoy it! We ended up doing it quite a few times! :)

  5. What a great experiment! We will have to try it.


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