Fun egg experiment to see if your egg is fresh or not!


11 Years
Jul 21, 2008
In this experiment, you can find out if an egg is fresh or not without cracking it open.

You will need: an egg, 1 teaspoon of salt, water, and a glass.

Step 1 Fill a glass with water, then stir in a teaspoon of salt.

Step 2 Carefully add the egg. if it lies at the bottom of the glass, the egg is fresh. If it floats to the surface, the egg is stale. This test works because an old egg contains more air than a fresh egg, which makes the old egg float more easily. The eggs that we buy have been kept in cool storage. The longer the egg is stored, the more the egg white evaporates, or turns to vapor. As the egg white evaporates, the air sac at the top of the egg gets larger. That is why a stale egg floats in water. You can also tell if an egg is fresh when you break it open. If the egg is fresh, the yolk will be firm and plump, and if the egg is stale, the yolk will be watery. If the egg is very stale, it will smell horrible!!

Enjoy this fun experiment! -Chickenlover98


Flock Mistress
12 Years
Jun 29, 2007
Kansas~50+ yrs of chickens
It works without adding salt to the water too. Been doing it that way for years.

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