| The purpose of this science fair project is to explore | | | | ball. Place the cork stopper into the top of the water |
| the properties of carbon dioxide. Carbon dioxide is a | | | | jug. Place the water jug in a warm area. |
| gas found in the atmosphere. Carbon dioxide is made | | | | Step #4: |
| up of one carbon and two oxygen atoms. Often times | | | | Squeeze the air out of the beach ball until it is |
| it is referred to by its formula "CO2". Plants use carbon | | | | completely deflated. Attach the small air opening of the |
| dioxide to feed themselves during photosynthesis. In its | | | | beach ball to the medicine dropper. |
| solid state, carbon dioxide is called dry ice. | | | | Step #5: |
| In this science fair project you will create carbon | | | | Leave the apparatus over night. The ball should be |
| dioxide using sugar, molasses, and yeast. You will also | | | | inflate within 24 hours. Carbon dioxide has been |
| create carbon dioxide by fermentation of yeast and | | | | created which fills the beach ball with carbon dioxide |
| sugar. This fermentation will create a carbon dioxide | | | | gas thus inflating it. Record your observations. |
| gas that has the ability to inflate a balloon. | | | | Complete the following steps to create carbon dioxide |
| Note: | | | | and fill a balloon by fermentation of yeast, sugar, and |
| You will need several days to complete this science | | | | water: |
| fair project. | | | | Step #1: |
| Hypothesis: | | | | Fill the empty gallon jug 3/4 full of water. Dump one |
| The enzymes in yeast cause sugar to convert to | | | | cup sugarand yeast into the water jug. Make sure the |
| alcohol and carbon dioxide gas. | | | | yeast and sugar dissolves. |
| Variables: | | | | Step #2: |
| Use of yeast with sugar and/or molasses and water | | | | Fit the mouth of the deflated balloon over the mouth |
| Materials Needed: | | | | of the waterjug. Place the water jug in a warm area |
| - Two Gallon jugs | | | | that is exposed to light. Make sure, however, that the |
| - Beach ball | | | | light is not bright. |
| - Cork stopper | | | | Step #3: |
| - Medicine dropper | | | | You will notice that bubbles form in the liquid. The |
| - Balloon | | | | bubbles consist of carbon dioxide. The carbon dioxide |
| - Spoon | | | | gas will have enough pressure to slightly inflate the |
| - Measuring cup | | | | balloon. This fermentation and inflation process will take |
| - Water | | | | place over several days. Does the balloon fill |
| - Sugar | | | | completely? Record your observations. |
| - Molasses | | | | Summary of Results: |
| - Yeast | | | | We could make carbon dioxide because the yeast |
| SCIENCE FAIR PROJECT INSTRUCTIONS: | | | | plants that grow in our sugar, molasses, and yeast |
| Complete the following steps to create carbon dioxide | | | | solution convert the sugar to alcohol and carbon |
| using sugar,molasses, and yeast: | | | | dioxide gas. The carbon dioxide is a gas that causes |
| Step #1: | | | | pressure and inflates the beach ball. The carbon |
| Fill the gallon jug with water until it is 3/4 full. | | | | dioxide gas should remind you of the bubbles you see |
| Step #2: | | | | in soft drinks. |
| Dump one cup of sugar, two table spoons of | | | | The fermentation process creates carbon dioxide by |
| molasses, and yeast into the water jug. Mix the | | | | converting the sugar to alcohol and carbon dioxide as |
| solution with a spoon. | | | | well. The conversion is possible due to the enzymes in |
| Step #3: | | | | the yeast. The alcohol dissolves in the water. The gas |
| Place the medicine dropper into the cork stopper to | | | | escapes the water and flows into the balloon causing |
| act as a tube between the water jug and the beach | | | | it to inflate. |