Experimenting with a naked egg is the perfect kitchen science experiment to teach kids a how the cells in their body work. Kids will get an inside look into a raw egg by using common kitchen supplies to dissolve the shell right off of it! Then they will experiment with the naked egg to see how it changes in various solutions.

Make naked eggs and see how they change in different liquids. The results may surprise you! The naked egg is a fantastic first lesson in biology for kids.

Safety Alert: Always make sure to wash your hands after handling raw eggs.

Making a Naked Egg

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We headed into the kitchen to gather the following supplies:

  • Eggs
  • Vinegar
  • Food Coloring (optional)
  • Different clear liquids (corn syrup, carbonated water, clear soda, salt water, sugar water, soapy water, etc.)

To make our naked egg we followed these directions:

  • Immerse each egg in a cup of vinegar. We started out with four eggs, each in their own cup of vinegar. I’m glad we did four, because one accidentally broke, but we still had three to experiment with! The egg will float at the top and a bit will hover above the surface of the vinegar, which is just fine.

Make naked eggs and see how they change in different liquids. The results may surprise you! The naked egg is a fantastic first lesson in biology for kids.

  • Place the cups in the refrigerator. After about 24 hours check to see if the egg shell has completely dissolved. If not, drain the vinegar and add some fresh vinegar to each cup. You can even add 10 drops of food coloring per cup if you want a brilliantly colored naked egg!

We observed bubbles on the surface of the eggshell almost immediately. Those bubbles are carbon dioxide gas forming due to the reaction between vinegar (which is acidic) and the calcium carbonate egg shell. (Take a look at this amazing color changing fizzy reaction or the explosive film canister rockets to see other examples of an acid reacting with a base!) Over time the vinegar will completely dissolve the entire egg shell.

Make naked eggs and see how they change in different liquids. The results may surprise you! The naked egg is a fantastic first lesson in biology for kids.

Exploring the Naked Egg

Once we had our colorful naked eggs we experimented to see what would happen when we put them into other liquids besides vinegar. We chose to use salt water, Sprite, and corn syrup, since we had those on hand.

Make naked eggs and see how they change in different liquids. The results may surprise you! The naked egg is a fantastic first lesson in biology for kids.

We placed our eggs in their respective liquids, labeled each jar, and left them in the refrigerator for another day. The first thing that impressed me was how fast the color from the egg in salt water leached out! Why do you think this happened?

The results were pretty cool. We ended up with two plump eggs and one egg that my three-year-old said “went flat”. The red dehydrated egg was the one we put into the corn syrup.

Make naked eggs and see how they change in different liquids. The results may surprise you! The naked egg is a fantastic first lesson in biology for kids.

The Science Behind the Naked Egg Experiment

The membrane of a cell (in this case, the egg) is semipermeable, meaning that small particles can go in and out of the cell while large particles stay out. Water and other nutrients (and food coloring) are small enough to travel in and out of the cell. When the concentration of water in the cell is different than the concentration of water outside of the cell, the water will move either in or out of the cell to balance the concentration inside and out. This is called osmosis.

Osmosis explains why the egg in the corn syrup shriveled up. Corn syrup has a very low concentration of water in it so some of the water from the inside of the egg traveled through the membrane into the corn syrup, making the egg cell shrink.

We learned that salt water and sugary soda have similar water concentrations as the inside of the egg since those two eggs stayed plump!

I took this experiment one step further, just to fulfill my own curiosity. I placed the red egg (the one that got dehydrated in corn syrup) into a cup full of water for another day. What do you think happened? (I’ll tell you…it plumped right back up as water from the cup traveled back into the egg via osmosis. So cool!)

The Curious Kid’s Science Book

This experiment is one of over 100 from Asia Citro’s new book, The Curious Kid’s Science Book. She is the author of the blog Fun at Home With Kids, which is full of unique, colorful, educational, and safe activities for kids. If you enjoyed this experiment you will LOVE the other 100+ experiments in The Curious Kid’s Science Book.

Make naked eggs and see how they change in different liquids. The results may surprise you! The naked egg is a fantastic first lesson in biology for kids.

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By | 2017-04-22T15:21:36+00:00 October 10th, 2015|Kitchen Science, Science, STEM Saturday|22 Comments

22 Comments

  1. Kelli Becton August 19, 2014 at 8:22 pm - Reply

    Your peeled eggs look great! I seem to have lost our other egg pics – I’m Pinning this :O)

  2. Crystal August 20, 2014 at 4:12 am - Reply

    Hey thanks! I love your awesome blog. We are new to homeschooling so it’s nice to glean knowledge from somebody who has been doing it for awhile πŸ™‚

  3. Carla October 10, 2015 at 10:25 am - Reply

    I love this experiment! It’s always amazing how the membrane stays intact while the shell dissolves. And I LOVE your pictures…they look fantastic!!

  4. Corrie October 10, 2015 at 5:51 pm - Reply

    Please forgive my dumbness. I am so new to science and trying to understand it. I don’t quite understand why the water left the egg to go into the corn syrup. Did any of the corn syrup go into the egg?

    • Crystal October 12, 2015 at 8:01 am - Reply

      Hi Corrie, this is not a dumb question at all! I’m glad you asked.

      Osmosis is kind of a weird concept. It’s all about the concentration of water. So you know that corn syrup is really thick and sugary and doesn’t contain much water. The inside of an egg, however, has a lot of water in it! So the water from inside the egg travels through the membrane to the corn syrup to try to equal out the concentration of water on each side of the egg membrane. Since the egg is losing water it deflates like a flat tire πŸ™‚

      I took that same red egg and placed it back in a jar of water after it had been deflated in corn syrup. Guess what? It plumped right back up. At that point, there was less water inside of the egg so water traveled back through the membrane into the egg to make the concentration equal, inside and out. Pretty cool!

      Let me know if you have more questions or if this helped clear things up πŸ™‚

  5. Emma October 13, 2015 at 10:06 pm - Reply

    What a colorful version of the egg experiment! I love this new book from Asia Citro as well! Thanks for sharing at the Thoughtful Spot!

  6. vicki October 14, 2015 at 6:42 pm - Reply

    This was awesome!! My son found this experiment to be a favorite. We did the vinegar, then corn syrup and then colored water. I will have to share with him the rest of the options you have here.

  7. Karen @ Raising Little Superheroes October 16, 2015 at 2:50 am - Reply

    What a fun science experiment! I had no idea that corn syrup would do that to the egg. I’ll have to try this with my children. Thanks for sharing at the #Made4Kids Link Party!

  8. FarZain October 17, 2015 at 1:01 am - Reply

    This is just amazing. I had no idea of what the corn starch could do to the egg. I can’t wait to try this out with my daughter!
    Thanks for sharing #Toddlerfun

    FarZain
    @http://colorsofourrainbow.blogspot.ae/

  9. My Bored Toddler October 23, 2015 at 6:08 am - Reply

    Such a great idea. I always struggle to come up with simple science ideas. Thanks for sharing on #ToddlerFunFriday

  10. Michelle September 9, 2016 at 2:33 pm - Reply

    Do I boil the egg first or are they straight from the fridge?

    • Crystal September 13, 2016 at 4:38 pm - Reply

      Straight from the fridge! That’s one of the things that makes it so cool…You don’t often get to see inside a raw egg!

  11. lauryn October 4, 2016 at 5:23 pm - Reply

    Hi my daughter is doing a scientific inquiry project on naked eggs and she asked me for help and I didn’t understand it so can you help me understand.

    • Crystal November 27, 2016 at 10:31 pm - Reply

      Hi Lauryn, what specific questions do you have?

  12. Marissa November 27, 2016 at 8:57 pm - Reply

    Do you use the eggs that were in the vinegar in the other liquids, or new eggs? I’m sorry if this is a dumb question πŸ™‚

    • Crystal November 27, 2016 at 10:29 pm - Reply

      Not a dumb question at all! You use the eggs that were in the vinegar. The vinegar is what makes the shell dissolve, and then you can put those “naked eggs” in the other liquids to see how they change. It’s pretty cool!

  13. PHOENIX January 31, 2017 at 7:44 am - Reply

    Can u help me know why the egg in the salty water given its color out so immediately????

    • Crystal January 31, 2017 at 9:33 pm - Reply

      That’s a great question. I don’t actually know the answer! It was just an interesting observation we made.

  14. Jessica February 10, 2017 at 10:46 pm - Reply

    Do you have to refrigerator the eggs once they are inside the liquids?

    • Crystal February 27, 2017 at 9:01 pm - Reply

      Since the eggs are raw, yes, I do suggest keeping them in the refrigerator while they soak in the other liquids. Great question.

  15. Karen Miller September 20, 2017 at 6:34 pm - Reply

    So eggcited to try this with the Panda Daycare kids.

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