Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 180 · 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 magnet for the yeast balloon? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a paper clip (d) a small bottle
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) sugar (d) dry yeast
4. 4.⚖️ 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) True (b) False
5. 5.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
6. 6.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) salt (d) vinegar
7. 7.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it turns to sugar (d) it grows faster
8. 8.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) a paper clip (d) a magnet
9. 9.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) sugar (d) a battery cell
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
12. 12.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) warm water (d) sugar
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
14. 14.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
15. 15.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
16. 16.True or false: a magnet is something yeast needs. (a) True (b) False
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 yeast”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) sugar (d) time
19. 19.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a magnet (c) a battery cell (d) a paper clip
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) sugar (d) a small bottle
22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) sugar (d) turmeric powder
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a magnet (d) a balloon
25. 25.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
26. 26.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
27. 27.⚖️ 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 water temperature (b) the amount of water (c) the same bottles (d) the amount of sugar
28. 28.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
29. 29.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) time (d) warm water
30. 30.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
31. 31.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) a magnet
32. 32.⚖️ 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) False (b) True
33. 33.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) vinegar (d) sunlight
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.⚖️ 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
36. 36.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
37. 37.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.True or false: warm water is something yeast needs. (a) False (b) True
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) size of the balloon (c) the amount of water
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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