When air is heated it expands and some of it escapes out the bottle. When the matches go out, the air inside the bottle cools and contracts (takes up less space), thus creating a lower air pressure area inside the bottle than outside. The air molecules on the outside of the bottle push the egg into the bottle.
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Answer:
Egg in the bottle experiment explanation
When air is heated it expands and some of it escapes out the bottle. When the matches go out, the air inside the bottle cools and contracts (takes up less space), thus creating a lower air pressure area inside the bottle than outside. The air molecules on the outside of the bottle push the egg into the bottle.
Explanation: