I made a small experimental composition and made a model essay for the experiment.

1, I saw an interesting scientific experiment in a science magazine before: a bottle swallowed an egg. This experiment is very novel and interesting. The day before yesterday, the teacher left an assignment and did a small experiment. I decided to try it myself. I immediately found the experimental materials: an egg, a jar, a pack of matches and a piece of paper cooked by my mother in the morning.

At the beginning of the experiment, I asked grandpa to help me strike a match. I lit the paper and quickly put it into the jar. Then I put my head down and put the peeled eggs tightly on the jar mouth, and stuffed the jar tightly. Suddenly, plumes of white smoke like smoke, fog and dust flooded the whole bottle. Just then, I heard a bang, and a miracle appeared: the jar swallowed the egg as if it were enchanted.

3. "Wow, that's amazing!" I clapped my hands happily and shouted, "I succeeded in the experiment!" " "Do you know why the mouth of the bottle is so small, how can the egg fall into the bottle instantly? That's because the atmospheric pressure inside and outside the original bottle is equal, and the bottle mouth is smaller than the egg, so the egg can't be fixed. Put the lighted paper into the bottle, and block the bottle mouth with eggs, so that the outside air cannot enter. The burning of the paper consumes the oxygen in the bottle and reduces the air pressure in the bottle, so the outside air pressure is greater than the air pressure in the bottle, and the eggs are pressed into the bottle under the action of air pressure.

This experiment made me understand that there is knowledge everywhere in life. As long as we are good at observation and practice, we can acquire new knowledge. This experiment is really interesting!