ScienceBoom » egg http://scienceboom.com Science Demonstrations, Projects, Experiments and Teaching Tips from ScienceBoom Wed, 28 Dec 2011 20:40:10 +0000 en hourly 1 http://wordpress.org/?v=3.3 ScienceBoom Egg in a Bottle Demonstration http://scienceboom.com/89/scienceboom-egg-in-a-bottle-demonstration.htm http://scienceboom.com/89/scienceboom-egg-in-a-bottle-demonstration.htm#comments Thu, 31 Jul 2008 13:00:16 +0000 Michael Doig http://scienceboom.com/89/scienceboom-egg-in-a-bottle-demonstration.htm

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]]> This demonstration was filmed at Gateway Education Center during a professional development seminar.

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Materials

Milk Bottle (or other bottle with an egg size opening)
Hard Boiled Egg
Matches
Paper

Instructions

To get the egg into the bottle you:

  1. Hard boil several eggs for about 12 mins.
  2. Create a tightly wrapped piece of paper that will burn slowly.
  3. Light the paper and drop it into the bottle.
  4. Have an assistant place the egg on the opening.
  5. Watch in amazement!

To get the egg back out you:

  1. Turn the bottle over and shake out any loose matter.
  2. Adjust the egg so it makes a seal with the opening.
  3. Place the bottle over your lips so it seals.
  4. Blow forcefully into the bottle and move it away from your face.
  5. Watch in amazement!

Explanation

The burning paper causes air inside of the bottle to heat up and expand forcing some of the air out of the bottle. When the egg seals the top of the bottle, the flame goes out and the air on the inside of the bottle begins to cool and contract, which results in less air pressure inside the bottle. The air pressure outside is now greater and this causes the air pressure on the outside of the bottle to push the egg into the bottle.


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