MAGICAL EGG BOTTLE

Question:  Is it possible to get an egg in a bottle with a smaller circumference than the egg? And if it gets in the bottle how do we get it out still intact?

Hypothesis: If we change the air temperature and pressure in the bottle then the egg will fall in the bottle because the air pressure outside the bottle is higher creating an unbalanced force that will push the egg in the bottle. To get the egg out while still intact we need to reverse the air pressure.   

 

Materials: 

• 1 hard boiled egg, peeled
• 1 match
• A glass bottle with the mouth smaller than the egg but not too small 
• 1/4 cup vinegar 
• 1 tbl baking soda
• 1 tray
• newspaper

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Safety Procedures

Material 1: Matches are dangerous.
Material 2: Don't drop the glass.

Procedure:

   To get the egg in the bottle:

1. Gather materials
2. Put a small piece of newspaper in the bottle
3. Light the match
4. Put the match in the bottle
5. Put egg on top of bottle

   
   To get the egg out of the bottle:

1. Put baking soda in bottle
2. Put vinegar in bottle
3. Turn bottle upside down
4. Wait for the egg to slide out  

Special Needs:
Fire extinguisher in case someone drops a match, no carpet, ventilated room.

Watch a video of our experiment!

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The Science Behind It

  How does the egg get inside the bottle?
The air temperature inside the bottle gets warmer when you put the match in the bottle. The hot air then expands and goes out of the bottle. Then the egg is placed on the bottle causing the flame to go out because the flame uses up all the oxygen. Then the cold air pushes the egg in the bottle and acts like a vacuum. The egg slips in because the air pressure on the outside is greater than the air pressure on the inside. The cold air takes up less space and no air can fill the space in the bottle because the egg is there.

Getting the egg out of the bottle is the same concept. Except you need to reverse the air pressure. Instead of high air pressure pushing the egg into the bottle, high pressure needs to be created inside the bottle to push the egg out. This is done with the baking soda and vinegar.  When you mix the baking soda and vinegar, carbon dioxide is created which pushes the egg out.

Conclusions

We accept our hypothesis because  we thought that the change in air pressure and temperature would cause the egg to go in the bottle and it did. We also thought if we reversed the air pressure the egg would slip out.

About Joseph

I'm 11 years old. I like baseball, skiing, basketball and lacrosse.

About Kieran

I'm 10 years old. I like lacrosse, baseball and basketball.

ABOUT US

We've known each other since pre k. We are on the same lacrosse team and in the same class. Our teacher is Mrs. Sisca.