Egg in a Bottle Science Experiment

The experiment involves placing a hard-boiled egg into a glass bottle without using any physical force or breaking the egg.

Materials you will need

A glass bottle with a narrow neck (such as a milk bottle)

A hard-boiled egg

Matches or a strip of paper

Vinegar (optional)

A lighter (optional)

Methodology

1. Begin by hard-boiling an egg and allowing it to cool down completely. Make sure the egg is hard-boiled, as a raw egg could make a mess if it breaks inside the bottle.
2. Take the glass bottle and remove any labels or obstructions from the opening. Make sure the bottle is clean and dry.
3. If you want to remove the eggshell for a better visual effect, you can soak the egg in vinegar for a day or two. The vinegar will dissolve the shell, leaving the egg covered by a thin membrane. This step is optional but can enhance the experiment.
4. Place the peeled hard-boiled egg near the opening of the bottle to ensure that it will fit inside.
5. Light a match or a strip of paper and carefully drop it into the bottle. You want to create smoke inside the bottle. Be cautious and make sure not to burn yourself or any surrounding objects. We recommend this is performed by the parent.
6. Immediately place the egg on the mouth of the bottle, making sure it covers the entire opening. Take care not to touch the sides of the bottle with the egg.
7. Observe what happens. As the smoke inside the bottle cools down, it contracts, creating a partial vacuum. This reduced air pressure inside the bottle will cause the egg to be pushed inside to fill the void. This may take a bit of patience for this to happen, but be careful not to force the egg into the bottle manually.
8. Once the egg is inside the bottle, you can tilt the bottle to allow the egg to roll out.

Note: If you don't want to use fire or matches, an alternative method involves heating the air inside the bottle by placing it in a bowl of hot water or using a hairdryer to blow hot air into the bottle. This heating process will create a similar pressure difference, drawing the egg into the bottle.

Remember to exercise caution during the experiment, especially when handling fire or hot objects.