Egg-in-a-bottle

Egg-in-a-bottle



Impress your friends and family with this simple, quick, and super-cool science trick! You'll learn how to harness the power of expanding and contracting gasses to suck an egg into a bottle in which it would never normally fit.

Ages:
9 - 16
Est. Time:
<30 mins

How we did it:

Materials List

  1. hard boiled eggs
  2. jar - opening slightly smaller than width of an egg
  3. paper - roughly 1/2" by 4"
  4. lighter
  1. Gather the materials for your egg-in-a-bottle experiment!

  2. Carefully peel the shell off your hard-boiled egg. The smoother your egg, the better this experiment will work!

  3. With some parent help, light the end of the strip of paper and place it inside the jar.

  4. Quickly place the egg on top of the jar before the paper burns out. If you look closely, you should be able to see the egg vibrate ever so slightly as the paper burns.

  5. The flame will quickly go out, and when it does, don't blink! Your egg should start to compress and will get sucked down into the bottle. Ta-da! You've successfully managed to get your egg in the bottle.


    So what's happening? As the flame burns inside the bottle, it heats up the air around it, causing it to expand. If you saw your egg vibrating slightly, this was because air was escaping from the bottle. When the flame goes out, the air in the bottle cools and shrinks. This is what sucks your egg into the bottle!


    To get your egg out of the bottle, simply cut it into a couple smaller chunks by poking it with a knife. Then tip the jar to dump out the pieces.