There is an ingenious trick that allows you to bounce the cap of an empty bottle using air pressure. Since he could jump very forcefully, make sure you don't point him at anyone. If you compress the air inside so that it is forced to occupy an increasingly narrow space, the pressure will begin to increase. When you open the bottle, you will free it and the cork will start bouncing around the room!
Steps
Part 1 of 2: Twist the Bottle
Step 1. Get an empty water bottle
This experiment is most effective if the bottle is made of soft plastic. You have to be able to twist it, so if it is hard you will have more difficulty. Also, you may want to use a 500ml or larger one, not the smaller ones.
- The bottle must be empty: if you leave a small amount of water at the bottom, you will eventually see a cloud of water vapor being released.
- Usually, bottles with small caps work best.
Step 2. Remove the label
While this is not necessary, it may make it easier to twist the bottle during the experiment.
Put the label in the recycling bin when you have finished the experiment
Step 3. Squeeze the bottle in the center and twist it
To increase the air pressure inside, you need to decrease the space available by squeezing the bottle. Start squeezing it in the center, turning the bottom.
- At first the movement may create some problems for you. In some cases, it is easier if you begin to gradually expel the air. Remove the cap, press the bottle lightly and put it back, continuing to squeeze it.
- Make sure the cap is tightly screwed onto the neck before performing this step.
Step 4. Twist it on itself 4-6 times
As you turn it, you will notice that the movement becomes more difficult. Continue until you can no longer twist it. If you don't have enough strength, ask an adult to help you.
Point it away from your face and other people as you twist it in the center. While the cap is unlikely to pop during this operation, it could happen
Step 5. Unscrew the cap with your thumb
Grab the bottle and place it firmly against your abdomen, with the cap facing you. Use the side of your thumb to unscrew it quickly. Make sure you loosen it completely, otherwise it won't jump. If you do it right, it should bounce around the room.
- Another way to make it pop is to hold the bottle between your legs and twist it with your hand.
- If the cap does not pop, it means that the air pressure was not enough. Unscrew it, blow inside the bottle to inflate it again and try again.
Step 6. Watch out for water vapor
When the cork leaps into the air, you may notice a cloud of white vapor escaping - this is the water vapor that forms when you open the bottle. Even if there is pressure inside, the water molecules stick together. Once the cap is removed, the internal temperature drops and causes the water molecules to condense, transforming them into vapor.
It is the same principle by which clouds are formed in the sky. At lower temperatures, the water vapor condenses to form a cloud
Part 2 of 2: Reuse the Bottle
Step 1. Put the bottle back
Once the cap is thrown, you can repeat the experiment as many times as you want. Return the bottle to its original shape. Of course it will be a little bit ruined, but it will still work.
If the plastic breaks, the bottle can no longer be used for this experiment
Step 2. Fill the air bottle
Bring your mouth to the neck of the bottle and blow inside until it swells again. As it takes shape, you will hear a crackle. It shouldn't be full of air, but contain what you need to compress it.
To avoid spreading germs, don't use the same bottle that other people have used
Step 3. Put the cap back on and twist the bottle
Close it once more and squeeze it in the center, as you did before. Repeat the same steps, turning the bottle until you can no longer twist it. Remember that the more you turn it, the more pressure will build up inside.
- The bottle will begin to bend more easily if you use it several times.
- At some point, the plastic is likely to crack. In this case it will be unusable.
Step 4. Throw the cap into the air
Place the bottle against your chest, with the cap away from you. Unscrew it and watch it bounce around the room as it releases the air pressure. Repeat the experiment as many times as you like or until the bottle breaks.
- Remember not to direct it towards people or animals.
- Also, keep it away from your face.
Warnings
- Don't point it at your face.
- Do not even point it at other people and / or animals.
