Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 928 · 40 questions

What you do (Yeast is alive): 1. Pour warm (not hot) water into the bottle — an adult checks it. 2. Add the yeast and the sugar and swirl gently. 3. Stretch the balloon over the bottle’s mouth. 4. Wait 30 minutes, measure the balloon, then pour the mixture away and wash up.

1. 1.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) salt (d) sunlight
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) dry yeast (c) warm water (d) a small bottle
3. 3.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a battery cell (d) dry yeast
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) warm water
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of water (b) size of the balloon (c) the water temperature (d) the amount of sugar
8. 8.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
11. 11.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a magnet (c) a paper clip (d) a battery cell
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a balloon (d) turmeric powder
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a small bottle (d) a magnet
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
21. 21.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
23. 23.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
24. 24.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a paper clip
26. 26.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) salt
27. 27.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🔍 Which is the odd one out? (a) vinegar (b) time (c) sugar (d) warm water
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
30. 30.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to make it sweet (d) to colour it
31. 31.True or false: time is something yeast needs. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) a magnet
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) warm water (d) dry yeast
34. 34.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
37. 37.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
38. 38.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
39. 39.True or false: warm water is something yeast does not need. (a) True (b) False
40. 40.True or false: salt is something yeast does not need. (a) True (b) False

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