Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 352 · 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 comb for the yeast balloon? (a) needed (b) not needed
2. 2.True or false: a magnet is something yeast needs. (a) False (b) True
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a paper clip (d) a small bottle
5. 5.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
6. 6.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) it turns to bread (d) the balloon is smaller
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) warm water (d) a paper clip
10. 10.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) sunlight (d) time
11. 11.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
12. 12.True or false: a comb is needed for the yeast balloon. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
14. 14.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) time
15. 15.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
16. 16.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) sunlight
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
19. 19.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) dry yeast (d) a small bottle
21. 21.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a balloon (d) a battery cell
23. 23.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
24. 24.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
25. 25.⚖️ 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
26. 26.🍞 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
27. 27.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
28. 28.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) salt (d) time
29. 29.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it grows much faster (d) it bursts at once
30. 30.⚖️ 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) size of the balloon (b) the amount of yeast (c) the water temperature (d) the same bottles
31. 31.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
32. 32.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a mirror (d) turmeric powder
36. 36.⚖️ 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
37. 37.⚖️ 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 water (c) the same bottles (d) the amount of sugar
38. 38.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) dry yeast (d) a small bottle
40. 40.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed

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