Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 798 · 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.True or false: warm water is needed for the yeast balloon. (a) True (b) False
2. 2.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
3. 3.True or false: sunlight is something yeast does not need. (a) True (b) False
4. 4.⚖️ 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 sugar (b) size of the balloon (c) the same bottles (d) the water temperature
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) turmeric powder
6. 6.⚖️ 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 water temperature (c) the amount of yeast
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
8. 8.True or false: a comb is needed for the yeast balloon. (a) True (b) False
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a mirror
11. 11.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) sugar (d) a balloon
13. 13.True or false: salt is something yeast needs. (a) False (b) True
14. 14.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) warm water (d) a comb
18. 18.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
19. 19.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
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 kept the same. (a) False (b) True
21. 21.🧺 Do we need a comb 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? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
24. 24.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
25. 25.⚖️ 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) True (b) False
26. 26.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) warm water (d) dry yeast
28. 28.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) sugar (d) a battery cell
30. 30.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of sugar (c) size of the balloon
33. 33.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
34. 34.True or false: vinegar is something yeast does not need. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) vinegar (b) salt (c) warm water (d) a magnet
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a balloon (d) a mirror
37. 37.True or false: time is something yeast does not need. (a) True (b) False
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
40. 40.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed

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