Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 984 · 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.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) a small bottle (d) warm water
3. 3.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) time
4. 4.True or false: salt is something yeast does not need. (a) False (b) True
5. 5.⚖️ 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 measure it (c) we change it
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) dry yeast (c) a mirror (d) turmeric powder
7. 7.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
8. 8.⚖️ 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 measure it (c) we keep it the same
9. 9.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
10. 10.True or false: time is something yeast does not need. (a) True (b) False
11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
12. 12.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
16. 16.True or false: sugar is something yeast needs. (a) True (b) False
17. 17.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🛟 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
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) time
21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.⚖️ 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
23. 23.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) sugar
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a balloon (d) warm water
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) a small bottle (d) a balloon
26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a paper clip (d) a magnet
28. 28.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
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.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
31. 31.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
32. 32.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
33. 33.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) vinegar (d) salt
34. 34.⚖️ 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 same bottles (b) the amount of water (c) size of the balloon (d) the water temperature
35. 35.🔍 Which is the odd one out? (a) salt (b) warm water (c) vinegar (d) sunlight
36. 36.⚖️ 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
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) the same bottles (b) the amount of water (c) the amount of yeast (d) size of the balloon
38. 38.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) sugar (d) a comb
40. 40.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a battery cell (d) a mirror

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