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PSPKK12

Inverted Balloon in a Bottle

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Deliver some major wow factor to a lesson about air pressure by making a balloon magically invert itself into a bottle. After the kids see this inverted balloon in a bottle science trick they will think you went to school at Hogwarts!

A child staring at a balloon inverted into a bottle

Getting Ready for Inverted Balloon in a Bottle

For such an impressive activity, the inverted balloon in a bottle experiment is actually very simple to set up. We gathered the following supplies:

  • Glass bottle with a narrow neck
  • 1 Tablespoon water
  • Balloon
  • Oven mitts

The kids poured 1 tablespoon of water into the bottle using a funnel. The amount doesn’t have to be exact. Simple as that, we were ready to begin!

Deliver some major wow factor to a lesson about air pressure by making a balloon magically invert itself into a bottle. After the kids see this inverted balloon in a bottle science trick they will think you went to school at Hogwarts!

Inverted Balloon in a Bottle

The rest of the experiment moved quite quickly and definitely required adult supervision.

I placed the bottle in the microwave for one minute, long enough for the water to boil. We discovered that the bottle was actually too tall to fit into our microwave standing up, so I rested it diagonally in a glass bowl and it worked perfectly. Another option would be to boil a pot of water on the stove and set the glass bottle inside of it until the water within the glass bottle boils.

The glass bottle was very hot so I was careful to handle it using oven mitts and to warn the kids against touching it.

Once the water in the glass bottle began to boil I removed it from the microwave and placed it on a hot pad on the counter. Quickly and carefully, I stretched the mouth of a balloon over the bottle opening, making sure to center the balloon. Then we sat back to watch and observe.

The first thing the kids observed was steam in the bottle condensing back into water. We could see little water droplets forming on the inside of the glass as the bottle cooled.

Deliver some major wow factor to a lesson about air pressure by making a balloon magically invert itself into a bottle. After the kids see this inverted balloon in a bottle science trick they will think you went to school at Hogwarts!

Within 30 seconds we watched as the balloon started moving all on its own. Slowly, the end of the balloon was pulled into the glass bottle, as if by magic. And then POP! The balloon inverted completely into the bottle and continued to expand inside. The kids could not believe their eyes!

Deliver some major wow factor to a lesson about air pressure by making a balloon magically invert itself into a bottle. After the kids see this inverted balloon in a bottle science trick they will think you went to school at Hogwarts!

The Science Behind the Inverted Balloon in a Bottle

Water inside the bottle turns into water vapor when it is boiled. This water vapor, or steam, pushes the air out of the bottle.

When it cools, with the balloon stretched over the opening, the water vapor condenses and turns back into liquid water. This creates a difference in pressure between the inside and the outside of the glass bottle.

Since the pressure is higher outside, air rushes into the bottle, taking the balloon along with it. The more the bottle cools down, the more air comes in from the outside, and the more the balloon expands inside the bottle. Wow!

Deliver some major wow factor to a lesson about air pressure by making a balloon magically invert itself into a bottle. After the kids see this inverted balloon in a bottle science trick they will think you went to school at Hogwarts!

More Science Activities and Ideas

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Filed Under: Crafts/Activities, Experiments, Science Tagged With: Kindergarten, Pre-K, Preschool, Science

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Reader Interactions

3 Comments

  1. Amy

    June 17, 2020 at 10:19 pm

    Can you use a plastic bottle?

    Reply to this comment

Trackbacks

  1. 15 Very Simple Science Experiments (Using What You Already Have at Home!) - No Guilt Mom says:
    March 16, 2018 at 2:37 pm

    […] 9. Inverted balloon in a bottle […]

    Reply to this comment
  2. Beyond Limits Academy-My Father’s World, Week 3 – Beyond Limits Academy says:
    September 15, 2018 at 6:53 am

    […] different activities. We used a bottle, balloon and some water for our first activity. The link is this one. She loved this activity. The suction “pop” happens so fast that she missed it the […]

    Reply to this comment

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