Pressure fountain with balloon - English

In this video, you will make a wonderful water fountain with very simple materials.

For this, you will need a balloon, a plastic bottle, a bendable straw, glue, and a pair of scissors.

Make a hole near the mouth of the plastic bottle with scissors. Insert a straw in the bottle and secure the hole with the help of glue. Fill the bottle with water. Now blow a balloon and hold its neck with fingertips. Carefully fix the balloon on the mouth of the bottle. When you release the air from the balloon, it creates pressure in the bottle and thus pushes water out creating a wonderful fountain!

So, let’s look at what actually happens in this experiment? The air inside the balloon is under higher pressure. When you place the inflated balloon on the mouth of the bottle, the air pressure on top of the bottle increases. This pushes down on the water in the bottle which rises through the straw and comes out making our little fountain

Instead of a single straw, you can also fix five straws in the bottle. When you fill the water in the bottle and fixed an inflated balloon, you will see an elegant fountain with five streams.

Make your own pressure fountain and have Fun!

We hope you enjoyed this experiment and learned something new. For more such hands-on science and mathematics activities visit our YouTube channel. IISER Pune science activity Centre.

Team: Ashok Rupner, Chaitanya Mungi, Shraddha Bhurkunde, Neha Apte, Sandeep Jadhav