RAINBOW RUBBER EGGS

Learning how to make a rubber egg a lovely science experiment that children enjoy. And it is really easy! All you need to do is drop an egg in vinegar and come back in a few days to find…a bouncy egg!

Making a rubber egg is a wait and see experiment but if you have a few days, you and your children will be amazed at what happens to an eggshell after sitting in vinegar.

The layers of an eggMaking a rubber egg is also a great way for you to learn about the layers of an egg. An egg has the following layers:

o The eggshell made from calcium carbonateo Two shell membranes which protect bacteria from entering

the eggo The egg white or albumen which provides proteino The yolk membrane which holds the egg yolk togethero The yolk which contains vitamins, minerals, and fat

Once you dissolve the eggshell, the membranes will be on full display. Once you puncture the membrane you will see the white and yolk.

How to Make A Rubber EggRubber Egg Materials

o Eggso Clear cup or jaro Distilled White Vinegaro Food Colouringo Bowl of water

The Rubber Egg ExperimentTime needed: 3 days.

Here is how you make a rubber egg

Place a raw egg carefully in a clear jar or cup.

Add vinegar

Pour enough vinegar in the cup to completely submerge the egg.

Add food colouring

Add in a few drops of food colouring and stir gently. To create Rainbow Rubber eggs, make a rubber egg for each colour of the rainbow.

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1. Wait!Observe the eggs each day. The vinegar will dissolve the

eggshell. As the shell dissolves it will begin to bubble.

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Rub off the shell

After about 3-5 days remove the egg from the vinegar and place it in a bowl of water. Gently rub away the shell to

reveal the membrane that lies just below it.

1. Bounce it!

Bounce your egg…but not too hard! The egg will now be bouncy and rubbery, but it is still raw on the inside. Press it and bounce to test just how rubbery it is.

but beware, it will still break! Make sure you break at least one to see what the egg looks like inside!

 

The science of a rubber eggEggshells are made from calcium carbonate. Vinegar is an acid that reacts with calcium carbonate. The bubbles that form around the eggs over the course of a few days are carbon dioxide bubbles caused by the reaction between vinegar and

calcium carbonate. Eventually the eggshell fully dissolves leaving only the outer membrane which is soft and flexible.

Once you remove the egg from the vinegar the calcium carbonate shell will be a chalky residue on the egg membrane.

Notice how the egg white is coloured after sitting in coloured vinegar, meaning the colour penetrates the eggshell and the membrane.

This is an eggciting experiment.

Hope you enjoy it Ducks !

Take care love Carrie x