How to make a cloud?

Materials:

• Clear Plastic water Bottle with its cap
  
• Rubbing Alcohol

Take an empty water bottle. Make sure that the plastic is not too tick to make the experiment easier.
Pour a little bit of rubbing alcohol into the bottle, close it and then shake it so that the alcohol covers all the internal parts of the bottle.

Twist the bottle from the bottom with both hands in opposite directions in order to increase the pressure at the top of the bottle.

Keep twisting until you can no longer do it.

Now, unscrew the cap of the bottle very slowly until it is about to pop off. When you feel that phenomenon just let it pop off quickly and observe a white cloud escaping the bottle !

Be careful to make sure that you don't point anyone while oppening the bottle because the cap can be ejected with the pressure !

Explanation:

As you now, clouds are made of little drops of water vapor, and there is invisible molecule of water all around us.

By twisting the bottle,  you will compress the air molecules of the bottle and they will tend to expand while releasing the cap.

Then, the air molecules will get cooler and will stick with the water and the alcohol vapor molecules.

Like the clouds in the sky, tiny water drops will be formed and a cloud will escape from your bottle !

Comments

[AL 1A CP]

Fascinating !