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How to Make a Rubber Egg

April 1, 2019 by OneMommy

Springtime is the time for baby chicks, bunnies, and fun activities involving eggs.

This week we had fun with a super simple egg experiment.

Your child will be fascinated when you discover how to make a rubber egg.

For more egg science, check out our floating egg experiment, too.

how to make a rubber egg

 

Egg experiments are perfect for spring.

For more fun with eggs…try making your own egg submarines.

Rubber Egg Experiment

Materials Needed:

  • 1 raw egg
  • vinegar
  • container large enough to hold egg and vinegar

 

Making a rubber egg is super simple.

Place your uncooked egg into the container and cover it with vinegar.

You will notice that bubbles appear on the egg’s shell almost immediately.  After a few minutes the area surrounding the egg will be full of bubbles.

make a bouncy rubber egg

 

Place your egg in a cool, dark place for at least two days.

After two days, take out the egg and dry it off.  The egg will be noticeably larger than it was.

We got another egg out to compare the two.  Have your child compare the sizes and how each egg feels.

The egg feels rubbery!

how to make a bouncy rubber egg

 

Gently squeeze the egg.  You can squish it just a bit.

egg experiment -- make a rubber egg

Glowing Egg Experiment

Take the activity further by making your rubber egg glow.

Take the egg into a semi-dark room.

Place a flashlight underneath the egg and check out the results.

The rubber egg will glow!   How cool is that?

egg experiment -- make a rubber egg (and glowing egg)

Bouncing Egg

Finally, try bouncing your egg on a shallow dish.

We were able to bounce the egg gently several times from a height of 3 inches.

Remember, it’s still an uncooked egg, and eventually it will break.  (And, since it’s a raw egg — make sure your child washes their hands once they are finished.)

making a rubber egg

 

Why does the rubber egg experiment work?

The vinegar is an acid.

It dissolves the calcium carbonate that makes up the egg’s shell — the carbonate part is what causes those carbon dioxide bubbles you see during the experiment.

What’s left is the egg’s membrane, which will absorb some of the vinegar.  This is what causes the egg to get larger.

how to make a rubber egg -- simple egg experiment

 

Extensions to the rubber egg experiment:

  • Try the experiment with a white egg and a brown egg.  Does one have a shell that dissolves faster?
  • Does the experiment work with a hard boiled egg?

 

Spring is the perfect time to try a few egg experiments of your own.

 

You may also like:

  • Get an Egg in a Bottle without Breaking It 
  • Simple STEM Activities for Kids
  • Plastic Egg Activities 

 

First published on March 23, 2016.

Filed Under: Science Tagged With: science experiment

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