Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 478 · 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 is the odd one out? (a) salt (b) vinegar (c) sunlight (d) sugar
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread
3. 3.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
4. 4.⚖️ 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
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a comb (d) turmeric powder
8. 8.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
9. 9.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) dry yeast (d) a magnet
11. 11.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) time (d) a magnet
12. 12.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) salt
13. 13.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a magnet (d) sugar
15. 15.True or false: time is something yeast does not need. (a) True (b) False
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
17. 17.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a mirror (d) a balloon
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) dry yeast (d) a balloon
23. 23.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (d) a paper clip
26. 26.True or false: sugar is something yeast needs. (a) False (b) True
27. 27.True or false: time is something yeast needs. (a) True (b) False
28. 28.True or false: dry yeast is not needed for the yeast balloon. (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 what we measure? (a) size of the balloon (b) the amount of sugar (c) the water temperature (d) the amount of yeast
30. 30.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a comb (d) a paper clip
31. 31.⚖️ 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 amount of sugar (d) the same bottles
32. 32.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) warm water (d) a paper clip
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) turmeric powder
35. 35.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
37. 37.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) sunlight
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) dry yeast (c) sugar (d) a balloon
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) turmeric powder (d) dry yeast
40. 40.True or false: a comb is not needed for the yeast balloon. (a) True (b) False

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