Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 200 · 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.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
2. 2.⚖️ 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 water temperature (b) the amount of sugar (c) the amount of yeast (d) size of the balloon
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a battery cell (d) a small bottle
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 yeast”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🔍 Which is the odd one out? (a) vinegar (b) time (c) sunlight (d) a magnet
6. 6.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a battery cell (d) a paper clip
7. 7.🛟 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
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) turmeric powder
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a balloon (c) sugar (d) a small bottle
10. 10.True or false: vinegar is something yeast does not need. (a) False (b) True
11. 11.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) vinegar (d) time
12. 12.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
13. 13.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) a small bottle (d) a balloon
15. 15.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) time (d) sugar
16. 16.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) carbon dioxide gas (d) smoke
17. 17.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
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) True (b) False
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) warm water (d) dry yeast
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a paper clip (d) warm water
21. 21.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
23. 23.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
24. 24.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
25. 25.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
26. 26.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
28. 28.True or false: warm water is something yeast needs. (a) True (b) False
29. 29.⚖️ 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 water (c) the water temperature
30. 30.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a comb (c) turmeric powder (d) a magnet
32. 32.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
34. 34.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) time (d) warm water
35. 35.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
37. 37.⚖️ 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 keep it the same (b) we measure it (c) we change it
38. 38.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
39. 39.True or false: sunlight is something yeast does not need. (a) True (b) False
40. 40.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a paper clip (c) turmeric powder (d) a comb

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