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Egg In A Bottle
Transcript of Egg In A Bottle
Students will determine how and why an egg is able to go into a bottle due to changes in air pressure. OBJECTIVE:
Students will determine how and why the egg goes into the bottle. -Narrow-mouthed jar (500 mL flask)
-A hard boiled egg
-Wooden matches/ lighter Materials 1) Peel the shells off the egg
2) Place the egg on the mouth of the jar
NOTE: The eggs sits there and does not move. There is a balance between the air pressure pushing down on the egg, the air pressure pushing up from inside the jar. Gravity pulls the egg down, but the bottle pushes it up.
3) Remove the egg. Light the piece of paper with a match and place it in the jar
4) Quickly place the egg over the mouth piece
NOTE: It was pushed into the jar by the air in the room.
5) Observe the egg
NOTE: When you changed the balance of pressure, the egg moved. In this experiment, you removed some of the air inside the bottle and it is not able to push up with the same pressure as it did before the experiment. Some of the air was removed during the process of burning the matches. More air was removed when the heated air inside the jar tried to escape. As it heated, it took up more space and it escaped the jar causing the egg to bounce. Hold the bottle upside down with the small end of the egg in the bottle neck. Remove any pieces of the burned paper towel. Tilt the bottle down until there is a small opening between the neck of the bottle and the egg and blow hard into the bottle making a closed seal with your mouth. Before you remove your mouth, tilt the bottle upside down until the egg settles in the mouth of the bottle. Move your mouth and the egg should come out.(The air pressure is greater inside the bottle so it pushes the egg back out.) As flame heated the air, the air particles began to move more rapidly. Some of the air particles escaped causing the egg to wobble. When the fire was extinguished, the air particles began to cool and slow down. The egg sealed the bottle and trapped a reduced amount of air in the bottle. This caused the air pressure inside the bottle to be less than the air pressure outside the bottle. The greater air pressure on the outside pushed the egg into the bottle. How To Remove The Egg Balances Between Air Pressure As flame heated the air, the air particles began to move more rapidly. Some of the air particles escaped causing the egg to wobble. When the fire was extinguished, the air particles began to cool and slow down. The egg sealed the bottle and trapped a reduced amount of air in the bottle. This caused the air pressure inside the bottle to be less than the air pressure outside the bottle. The greater air pressure on the outside pushed the egg into the bottle. Conclusion An air pressure difference causes movement of particles. The amount of pressure is determined by the difference of pressure in the air and the amount of area affected. This is also a good experiment to show that the use of oxygen molecules in a particular area causes a loss of air pressure. Procedures