Figure 1. This image shows what individual yeasts look like using a powerful microscope. These are specifically baker's yeast ( Saccharomyces cerevisiae). Carefully tie a length of string tightly around the base of each balloon to seal the balloon so that any gas inside cannot escape. When the balloon is tightly sealed, remove it from the bottle top, being very careful not to loosen the string or allow any air to escape from the balloon. Calculate the average water displaced for each condition over the three trials. Record the results in your data table. With its durable stainless steel construction, the Bestie Bottle ensures optimal insulation, keeping your dog’s water cool and refreshing even during scorching summer days. Additionally, it guarantees a safe and healthy mealtime experience as it is free from harmful chemicals commonly found in plastic alternatives. Repeat steps 3–17 two more times so that you have done a total of three trials. Each time be sure to record your results in your data table for the correct trial number.

The Bestie Bottle also keeps hot contents hot for up to 12 hours. So soups, teas, coffee and any other hot liquids will be good to go in your Bestie Bottle. Using the water from the pot will help you make sure that the water in each bottle is the same temperature. Add 2 tbsp. of baking soda to bottle #4. How do you think being in a basic environment will affect yeast fermentation? Sugar and baking soda: The baking soda in this condition will increase the environment's pH, making it more basic.

Now you are ready to measure the amount of CO 2 gas inside each balloon with a water displacement test. To do this, do the following: This science project is based on a classic science demonstration, nicely described by the Exploratorium, a hands-on science museum in San Francisco: After removing each balloon from its bottle, carefully tie a knot at the bottom of each balloon (where the string is) so that you can be sure no air will escape the balloons while you collect your data. Table 1. In your lab notebook, make a data table like this one to record your observations and results in. You will be recording how much water is displaced in milliliters (mL).

In this experiment, you added the same amount of sugar to each bottle because it is what the yeast uses to make CO 2 gas during fermentation. If you add more sugar, will you always get more CO 2 gas? How much more sugar can you add? Is there a limit? In what environment(s) did the yeast produce the least CO 2? What does this tell you about the conditions that yeast do not prefer for carrying out fermentation? For example, if the balloon for bottle #2 displaced 950mL in trial 1, 800mL in trial 2, and 1200mL in trial 3, then the average water displaced for #2 would be 983mL (since 950mL + 800mL + 1200mL = 2950mL, and 2950mL ÷ 3 = 983mL). You could try this science project again but instead of comparing salt, baking soda, and vinegar, you could try comparing different types of sugars or sugars from different sources, such as from various juices.How do you think increasing the salinity will affect the ability of yeasts to carry out fermentation? What about making the environment more basic or more acidic? To measure how well the yeasts carry out fermentation, you will use balloons to trap the CO 2 gas released by the yeasts during fermentation. To measure how much CO 2 is in each balloon you will then submerge each under water and use water displacement to measure how much space each balloon takes up. Which condition(s) will cause the formation of the most CO 2 gas and the most active fermentation? Terms and Concepts Add 2 tbsp. of vinegar to bottle #5. How do you think being in an acidic environment will affect yeast fermentation?

Sugar: This condition will be your positive control because it will have the sugar that yeasts need to eat and carry out fermentation. Are you tired of carrying separate water bottles and food bowls for your beloved dog during your outdoor adventures? Look no further! We have the perfect solution for you – the Bestie Bottle. Exploratorium Staff. (n.d.). The Science of Bread: Yeast-Air Balloons Activity. The Exploratorium. Retrieved February 27, 2014. So why wait? Say goodbye to cumbersome containers and hello to simplicity with the Bestie Bottle. Treat yourself and your bestie to the best bottle out!

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In the data table in your lab notebook, record how much water was displaced (how much water is in the beaker) by the balloon, in milliliters. This should be recorded in the column for Trial 1. Then empty the measuring cup. Imagine a 32 Oz Stainless Steel insulated water bottle with a convenient twist. It comes with two bowls that effortlessly attach at the bottom, providing you and your four-legged friend with both food and water on-the-go. No more hassle of carrying multiple containers or compromising on comfort while exploring the great outdoors. Sugar and vinegar: The vinegar in this condition will decrease the environment's pH, making it more acidic.