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Experiment No. 11
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Question:
What happens when Yeast has sugar to feed on? |
Experiments: To show what happens when Yeast has sugar to feed on.
Materials:
You will need:
Yeast solution,
vial,
balloon,
sugar.
Method:
1. We made up the yeast solution using warm water.
2. This solution was placed in the vial with a little sugar.
3. The balloon was carefully placed over the neck of the vial.
4. The balloon was left for about an hour at room temperature.
5. We recorded the results.
Result:
The balloon started to inflate.
Conclusion:
The yeast respired in the presence of sugar and oxygen to give CO2 (carbon dioxide) and H2O (Water). The CO2 produced caused the balloon to inflate.
(glucose) Yeast
C6H12O6 + O2 H2O + CO2 + Energy
(glucose) C6H12O6 + O2 H2O + CO2 + Energy
This chemical reaction is used in bread making. The carbon dioxide produces the holes in bread which allow it to rise. The breakdown of sugar gives us energy.
Sixth Class Experiments
1. Can Water Move up a Flower?
2. How can you show that water moves through the branch of a tree and its leaves?3. How can you see the roots of a plant grow if they're underground?
4. Can a plant beat an obstacle course and grow towards what it needs?
5. Can you grow your own mould?
7. What causes us to feel breathless?
8. Can you prove that humans breathe out CO2?
11. What happens when Yeast has sugar to feed on?
13. How does the selective barrier in a cell work?
14. Are cells in vegetables damaged when they're cooked?
15. How hard does the heart work?
16. How can you see your pulse?
17. How can you discover if food contains starch?
18. How can you discover if food contains protein?
