You are probably wondering
why the egg goes into the bottle. It all has to do with air pressure,
air molecules, and heat. The hot water heats the molecules of air in
the bottle and cause the molecules to move far away from each other.
When the water is poured out, the molecules of air in the bottle cool
down and move closer together thus creating a lower pressure of air
inside the bottle. Therefore, there is less air pressure on the
inside of the bottle and more air pressure on the outside of the
bottle. The air on the outside pushes harder on the egg than the air
on the inside does. The egg is then pushed into the bottle. The
"push" or pressure of the air molecules outside the bottle is so
great that it literally pushes the egg into the bottle.
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