Can you blow up a balloon without your mouth?

Can you blow up a Balloon without blowing the air in? Maybe. In this you will find the instructions to do it and you can do it yourself to see if this works.  Be careful, You may  need an adult to help you with some parts.

To start your experiment you will need some things. 2 Plastic Bottles (Coca Cola, Lemonade etc) 2 ordinary balloons, hot and cold water and an adult or tongs. For starters put the balloons on the bottles. On where the lid was. Prepare the water to hot water and cold water in separated containers. Once you have done this you can get your adult to help you put the bottle into the hot water. If you have tongs, just hold it around the neck and dunk it in. With the cold  water one you can  just put it in slightly. You do not need some tongs or an adult to help you with this part.

Once you have put the bottles in the water, you need to press the bottle right down into the water. Make sure the whole entire bottle is underwater. This is called immersing. You are Immersing the bottle in water. Why do you have to do this? So the hot air can heat up to bottle in water. That is why you have  to do this. The heat that the hot water has is going around the bottle that is heating the air that is in the bottle and that is what creates hot air. You still have to do the same with the cold water.

The next step is really easy. All you do is sit and wait. This is called observing. This is the scientific word for sitting and watching. As you observe. Have a look at the two different boxes. You might see one of them moving. Why is this. It is because the air is becoming hotter and thinking that it can escape through the balloon si the balloon is expanding and blowing up. As you Observe you might want to take some notes to see if there are any changes in your time of doing this.

Now I am going to explain what actually happened. As the air heated, all of the particles was whizzing around in the bottle and being heated up. Hot air rises, so the air would want to get out the balloon thinking that is the open world. As the balloon expands because the hot air is going in the balloon, blowing it up. But after a short while, The balloon will go down because the water will get to cold and the hot air will turn into the other bottle in the cold water. The particles will get cold as well and the other bottle. This is because the water in the container is colder that it was 30 minutes ago.

So, can a balloon blow up without blowing in to it. Yes you can. After a while it will go down by itself. This has proven that balloons will go up by itself with the right gear. I hoped you have been careful and if it did not work for you. Maybe you did it wrong.  

Down below there is a diagram that explains how it works:

Hot Water Cold Water