Egg-stra Special Demonstration: Egg in a Bottle Science Experiment by Nancy B's Science Club

Описание: Are you ready for an egg-cellent demonstration about the workings of air pressure? Take a crack at our egg in a bottle science experiment to learn more!

Video Transcript: Hi, I'm Nancy B from Nancy B’s Science Club. Today I'm going to show you how to get an Egg in a Bottle without breaking it. Using a few items right at home, you can do this experiment too. But make sure to use safety equipment, and invite an adult to help you.

Here’s what you’ll need:

A Wide-mouth bottle (or flask)
Hardboiled, pre-peeled Eggs (MEDIUM sized –not L or XL)
Wooden Stirring Rods
Laboratory glasses
And most importantly, Adult Supervision


Here’s a question for you: what’s inside the bottle?

If you said AIR, you’re right!

There are little pieces of air—we call them air molecules—bouncing all over the place and pushing on things. Some of them are pushing up on the egg.
Of course, there are some air molecules on the outside pressing down on the egg.

In fact, the air pressure in both directions is equal.

But if we heat the air inside, the heat is going to make the air molecules move around super fast. Some of them are going to manage to escape right around the rim of the egg because this is not a very tight seal between the egg and the bottle.
When I drop the candle in, watch how the egg bounces up and down as the air escapes.


After the air escapes from inside the bottle and the flame goes out, the air inside the bottle cools down and is pushing up less than the air on the outside pushing down. The air molecules on the outside push the egg into the bottle.

So how do you get the egg out without breaking it? We need to reverse the process. To get it IN, we needed more air on the outside than the inside. To get it OUT, we need more air pressure on the inside than the outside; then the extra air pressure on the inside will push the egg out.
Where do we all have a free supply of air? Our lungs!
Watch my cheeks puff up as I blow into this bottle.

That was fun! Make sure that you share your results of your egg in a bottle science experiment at facebook.com/educationalinsights.