Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 449 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) dry yeast (d) sugar
2. 2.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
3. 3.True or false: a magnet is something yeast needs. (a) True (b) False
4. 4.⚖️ 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
5. 5.⚖️ 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
6. 6.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) sunlight
7. 7.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
8. 8.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
9. 9.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a mirror (d) warm water
11. 11.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
12. 12.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
13. 13.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.True or false: sunlight is something yeast needs. (a) True (b) False
15. 15.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
17. 17.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) to make it heavy (d) it is food for yeast
18. 18.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
20. 20.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of water (d) the amount of sugar
22. 22.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) vinegar (d) a magnet
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a mirror (c) warm water (d) sugar
24. 24.True or false: a comb is needed for the yeast balloon. (a) True (b) False
25. 25.⚖️ 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 change it (c) we measure it
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
28. 28.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sugar (d) sunlight
29. 29.⚖️ 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 same bottles (b) the amount of water (c) size of the balloon (d) the water temperature
30. 30.🛟 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
31. 31.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
32. 32.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) sunlight (d) vinegar
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) dry yeast (d) warm water
34. 34.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) warm water (d) a battery cell
37. 37.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) dry yeast (d) a comb
39. 39.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) sugar (d) time
40. 40.True or false: time is something yeast needs. (a) False (b) True

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