Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 910 · 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.⚖️ 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 measure it (b) we change it (c) we keep it the same
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a magnet (d) a small bottle
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a battery cell (d) dry yeast
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) dry yeast (d) a battery cell
5. 5.True or false: a magnet is something yeast needs. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) sunlight
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 yeast (b) the water temperature (c) the same bottles (d) size of the balloon
8. 8.True or false: warm water is something yeast needs. (a) True (b) False
9. 9.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) a magnet (d) dry yeast
13. 13.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
14. 14.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) sugar (d) a paper clip
16. 16.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) salt (d) a magnet
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.True or false: vinegar is something yeast needs. (a) True (b) False
19. 19.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
23. 23.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) vinegar (d) sugar
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a comb
25. 25.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
27. 27.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) warm water (d) time
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a comb (d) a small bottle
29. 29.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
30. 30.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a small bottle (d) a comb
32. 32.⚖️ 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
33. 33.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) sugar (d) dry yeast
36. 36.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) sugar (d) turmeric powder
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a mirror (d) dry yeast
39. 39.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the amount of yeast (c) size of the balloon (d) the same bottles

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