Here's an interesting experiment. We guarantee you'll be talking about this one at school the next day.
Find a bottle with a long, narrow neck and set it on the table. The opening should be just small enough to keep the egg from falling inside.
Boil and peel a egg.
Have Mom or Dad drop 3 lit matches into the bottle (if Dad does the 'dropping' then make sure the fire extinguisher is handy).
Quickly place the egg over the mouth of the bottle.
What happens? The lit matches heat the air inside the bottle. When air is heated it expands (and takes up more room). As the heated air expands, some of it escapes out the bottle. When the matches go out, the air inside the bottle cools and contracts (and takes up less room), thus creating a lower pressure inside the bottle than outside. The greater pressure outside the bottle forces the egg into the bottle.
Want to get the egg out of the bottle? Turn the bottle upside down and blow into it. The increased air pressure in the bottle will cause the egg to pop back out!
Reeko Note. Reeko gets tons of email on this one so here's a little extra help. First off, check out the section on five tried and true rules on guaranteeing an experiment will work. If that still doesn't fix it then here are some additional tips...
Make sure the egg is boiled and peeled.
Drop the 3 matches in all at once. Don't light one match and drop in in, light another match and drop it in, light the next match and drop it in, light another match and drop it in... uhhh, I said 3 matches, didn't I...
You need to place the egg on the mouth of the bottle quickly.
If you're still having problems, try scrambling the eggs...
If it still doesn't work then put Vaseline on the egg and use a hammer...
