2. Materials
• Clear plastic bottles
• Balloon
• Yeast
• Sugar
• Warm water
• Measuring cup
• Tablespoon and teaspoon
3. Procedure:
• How to Inflate a Balloon With Yeast
1.Fill a plastic bottle with about 1 inch of warm water.
2.Pour in about 1 tablespoon of yeast and gently shake the bottle
up a little bit.
3.Add a teaspoon of sugar and swirl the bottle around a little
more.
4.Slide the neck of the balloon over the opening of the bottle.
5.Let the yeast work its magic for about 15-20 minutes. The
balloon should slowly start to inflate!
6. Fermentation is a chemical
breakdown of substances
by bacteria, yeast or other
microorganisms usually
involve in the production of
gases and heat.
Editor's Notes
https://www.ixl.com/science/grade-3
Yeast Balloon Experiment Conclusion
The science behind this yeast balloon experiment is related to the same reason yeast is used in many bread, dough, and baking recipes!
Yeast is a single-celled organism described as a “sugar-eating fungus”. Yeast needs food, warmth, and moisture to thrive and grow.
As the yeast grows and converts the sugar into energy, it releases Carbon Dioxide gas in a process called fermentation.
The tiny little carbon dioxide (CO2) gas bubbles get trapped in bread dough as it bakes and is what makes bread so soft and spongy!
Now in our experiment, the warm water in the bottle provides warmth and moisture for the yeast, while the sugar provides the food for the yeast to grow and expand.
The addition of carbon dioxide in the bottle increases the air pressure in the bottle, which pushes air into the balloon and inflates it!
Yeast is a fungi, it is made up of egg-shaped cells only visible through a microscope. They’re just like the molds found on the blue cheese, mushroom or antibiotics or penincillin.
